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JingHongYi PCB (HK) Co., Limited

Pagina principală > Produse > PCB Stencil

PCB Stencil

Categorii de produse de PCB Stencil , suntem producatori specializati din China, PCB Stencil , SMT Stencil furnizori / fabrica, en-gros produse de înaltă calitate de SMD Stencil R & D și de fabricație, avem perfect servicii post-vânzare și suport tehnic. Așteaptă cu nerăbdare cooperarea!

Toate produsele

  • Prototip PCB SMT Stencil Fabricare pentru asamblare PCB

    Prototip PCB SMT Stencil Fabricare pentru asamblare PCB

    • Marca: JHY PCB

    • ambalare: Pachetul cu vaccin

    Stenile prototip PCB SMT Stenculele prototip SMT sunt stenciluri tăiate cu laser personalizate din fișierele dvs. Gerber sau CAD pentru a se potrivi cu placa dvs. de circuit imprimat prototip. Aceste stencule de pastă de lipit fără ramă sunt concepute special pentru imprimarea manuală. Aceste tipuri de prototip PCB...

  • 0.15mm Thickness 585x585mm SMT PCB Stencil

    0.15mm Thickness 585x585mm SMT PCB Stencil

    • Marca: JHY PCB

    • ambalare: Vacuum Anti-Static Carton Packaging

    • Abilitatea de alimentare: 40000 Square Meters / Month

    0.15mm Thickness 585x585mm SMT PCB Stencil Manufacturer Keywords: Low Cost PCB Stencil, Express PCB Stencil, Aluminium PCB Stencil JingHongYi PCB (HK) Co., Limited is a Professional and Top Speed High-quality PCB Manufacturer in China. As The Best PCB + PCBA Manufacturer, We Are Your Best Choice. Apart from all types...

  • Larger Size SMT Solder Paste PCB Stencil

    Larger Size SMT Solder Paste PCB Stencil

    • Marca: JHY PCB

    • ambalare: Vacuum Anti-Static Carton Packaging

    • Abilitatea de alimentare: 40000 Square Meters / Month

    Larger Size SMT Solder Paste PCB Stencil Manufacturer Keywords: Larger Size PCB Stencil, Metal Stencil for PCB, Manual PCB Stencil Printer JingHongYi PCB (HK) Co., Limited is a Professional and Top Speed High-quality PCB Manufacturer in China. As The Best PCB + PCBA Manufacturer, We Are Your Best Choice. Apart from...

  • High Quality Frame PCB Stencil and Stainless SMD Stencil

    High Quality Frame PCB Stencil and Stainless SMD Stencil

    • Marca: JHY PCB

    • ambalare: Vacuum Anti-Static Carton Packaging

    • Abilitatea de alimentare: 40000 Square Meters / Month

    High Quality Frame PCB Stencil and Stainless SMD Stencil Manufacturer Keywords: Frame PCB Stencil, Stainless SMD Stencil, PCB Stencil Manufacturing JingHongYi PCB (HK) Co., Limited is a Professional and Top Speed High-quality PCB Manufacturer in China. As The Best PCB + PCBA Manufacturer, We Are Your Best Choice....

  • High Quality SMT SMD Meshed Aluminum Stencil Frame

    High Quality SMT SMD Meshed Aluminum Stencil Frame

    • Marca: JHY PCB

    • ambalare: Vacuum Anti-Static Carton Packaging

    • Abilitatea de alimentare: 40000 Square Meters / Month

    High Quality SMT SMD Meshed Aluminum Stencil Frame Keywords: PCB High Precision Stencil Printer, PCB Free Stencil, PCB Board Stencil JingHongYi PCB (HK) Co., Limited is a Professional and Top Speed High-quality PCB Manufacturer in China. As The Best PCB + PCBA Manufacturer, We Are Your Best Choice. Apart from all...

  • PCB Stencils Stainless Steel PCB Assembly SMT Framed Stencil

    PCB Stencils Stainless Steel PCB Assembly SMT Framed Stencil

    • Marca: JHY PCB

    • ambalare: Vacuum Anti-Static Carton Packaging

    • Abilitatea de alimentare: 40000 Square Meters / Month

    PCB Stencils Stainless Steel PCB Assembly SMT Framed Stencil Keywords: PCB Power Stencil, PCB Pool Free Stencil, PCB Layout Stencil JingHongYi PCB (HK) Co., Limited is a Professional and Top Speed High-quality PCB Manufacturer in China. As The Best PCB + PCBA Manufacturer, We Are Your Best Choice. Apart from all types...

  • PCB Printing SMD Solder Paste Meshed Stencil Frame

    PCB Printing SMD Solder Paste Meshed Stencil Frame

    • Marca: JHY PCB

    • ambalare: Vacuum Anti-Static Carton Packaging

    • Abilitatea de alimentare: 40000 Square Meters / Month

    PCB Printing SMD Solder Paste Meshed Stencil Frame with Blank Foil Keywords: PCB Solder Paste Stencil Printer, PCB Reflow Stencil, PCB Power Stencil Printer JingHongYi PCB (HK) Co., Limited is a Professional and Top Speed High-quality PCB Manufacturer in China. As The Best PCB + PCBA Manufacturer, We Are Your Best...

  • For PCB Assembly Aluminum SMT Stencil Frame

    For PCB Assembly Aluminum SMT Stencil Frame

    • Marca: JHY PCB

    • ambalare: Vacuum Anti-Static Carton Packaging

    • Abilitatea de alimentare: 40000 Square Meters / Month

    For PCB Assembly Aluminum SMT Stencil Frame Keywords: Aluminum SMT Stencil Frame, PCB Stencil Cost, PCB Stencil 3D Printer JingHongYi PCB (HK) Co., Limited is a Professional and Top Speed High-quality PCB Manufacturer in China. As The Best PCB + PCBA Manufacturer, We Are Your Best Choice. Apart from all types of...

  • Low price PCB assembly framed SMT stencil

    Low price PCB assembly framed SMT stencil

    • Marca: JHY PCB

    • ambalare: Vacuum Anti-Static Carton Packaging

    • Abilitatea de alimentare: 40000 Square Meters / Month

    Low price PCB assembly framed SMT stencil Keywords: PCB assembly framed SMT stencil, High Quality PCB Assembly Stencil, Framed SMT Stencil JingHongYi PCB (HK) Co., Limited is a Professional and Top Speed High-quality PCB Manufacturer in China. As The Best PCB + PCBA Manufacturer, We Are Your Best Choice. Apart from...

  • SMT Aluminum Stencil Frames with Mesh and Stainless Steel

    SMT Aluminum Stencil Frames with Mesh and Stainless Steel

    • Marca: JHY PCB

    • ambalare: Vacuum Anti-Static Carton Packaging

    • Abilitatea de alimentare: 40000 Square Meters / Month

    SMT Aluminum Stencil Frames with Mesh and Stainless Steel Keywords: SMT Aluminum Stencil Frames, High Quality PCB Assembly Framed Stencil, SMT Aluminum Stencil Frames With Mesh JingHongYi PCB (HK) Co., Limited is a Professional and Top Speed High-quality PCB Manufacturer in China. As The Best PCB + PCBA Manufacturer,...

  • Low Price PCB Stencil Frame

    Low Price PCB Stencil Frame

    • Marca: JHY PCB

    • ambalare: Vacuum Anti-Static Carton Packaging

    • Abilitatea de alimentare: 40000 Square Meters / Month

    Low Price PCB Stencil Frame Keywords: Low Price PCB Stencil Frame, PCB Stencil Gerber, PCB Stencil File JingHongYi PCB (HK) Co., Limited is a Professional and Top Speed High-quality PCB Manufacturer in China. As The Best PCB + PCBA Manufacturer, We Are Your Best Choice. Apart from all types of Printed Circuit Boards...

  • Custom SMT Stencil Frame PCB Circuit Boards Assembly

    Custom SMT Stencil Frame PCB Circuit Boards Assembly

    • Marca: JHY PCB

    • ambalare: Vacuum Anti-Static Carton Packaging

    • Abilitatea de alimentare: 40000 Square Meters / Month

    Custom SMT Stencil Frame PCB Circuit Boards Assembly Keywords: PCB Stencil Mask, PCB Stencil Making, PCB Stencil Layer JingHongYi PCB (HK) Co., Limited is a Professional and Top Speed High-quality PCB Manufacturer in China. As The Best PCB + PCBA Manufacturer, We Are Your Best Choice. Apart from all types of Printed...

  • PCBA Laser Stencil For PCB Component Assembly SMT

    PCBA Laser Stencil For PCB Component Assembly SMT

    • Marca: JHY PCB

    • ambalare: Vacuum Anti-Static Carton Packaging

    • Abilitatea de alimentare: 40000 Square Meters / Month

    PCBA Laser Stencil For PCB Component Assembly SMT Keywords: PCB Stencil Process, PCB Stencil Pattern, PCB Stencil Milling JingHongYi PCB (HK) Co., Limited is a Professional and Top Speed High-quality PCB Manufacturer in China. As The Best PCB + PCBA Manufacturer, We Are Your Best Choice. Apart from all types of...

  • PCB Assembly Stencil Good Quality PCB Stencil Manufacturing

    PCB Assembly Stencil Good Quality PCB Stencil Manufacturing

    • Marca: JHY PCB

    • ambalare: Vacuum Anti-Static Carton Packaging

    • Abilitatea de alimentare: 40000 Square Meters / Month

    PCB Assembly Stencil Good Quality PCB Stencil Manufacturing Keywords: SMT Stencil and PCB, PCB Stencil Types, PCB Stencil Storage JingHongYi PCB (HK) Co., Limited is a Professional and Top Speed High-quality PCB Manufacturer in China. As The Best PCB + PCBA Manufacturer, We Are Your Best Choice. Apart from all types...

  • Laser Stencil Stainless PCB SMT Stencil with Frame

    Laser Stencil Stainless PCB SMT Stencil with Frame

    • Marca: JHY PCB

    • ambalare: Vacuum Anti-Static Carton Packaging

    • Abilitatea de alimentare: 40000 Square Meters / Month

    Laser Stencil Stainless PCB SMT Stencil with Frame Keywords: PCB SMT Stencil with Frame, Laser Stainless PCB SMT Stencil, SMT Stencil Cleaning Process JingHongYi PCB (HK) Co., Limited is a Professional and Top Speed High-quality PCB Manufacturer in China. As The Best PCB + PCBA Manufacturer, We Are Your Best Choice....

  • Special offer Customized SMT PCB Stencil  Laser Stencil with Frame

    Special offer Customized SMT PCB Stencil Laser Stencil with Frame

    • Marca: JHY PCB

    • ambalare: Vacuum Anti-Static Carton Packaging

    • Abilitatea de alimentare: 40000 Square Meters / Month

    Special offer Customized SMT PCB Stencil Laser Stencil with Frame Keywords: Stencil Eagle PCB, SMT Stencil Printing Process, SMT Stencil HS Code JingHongYi PCB (HK) Co., Limited is a Professional and Top Speed High-quality PCB Manufacturer in China. As The Best PCB + PCBA Manufacturer, We Are Your Best Choice. Apart...

  • High Precision PCB Solder Paste Stencil

    High Precision PCB Solder Paste Stencil

    • Marca: JHY PCB

    • ambalare: Vacuum Anti-Static Carton Packaging

    • Abilitatea de alimentare: 40000 Square Meters / Month

    High Precision PCB Solder Paste Stencil Keywords: Stencil Layer PCB, Stencil Holder PCB, Stencil File PCB JingHongYi PCB (HK) Co., Limited is a Professional and Top Speed High-quality PCB Manufacturer in China. As The Best PCB + PCBA Manufacturer, We Are Your Best Choice. Apart from all types of Printed Circuit Boards...

  • Low Cost Stainless Steel Laser Cutting SMT Stencils

    Low Cost Stainless Steel Laser Cutting SMT Stencils

    • Marca: JHY PCB

    • ambalare: Vacuum Anti-Static Carton Packaging

    • Abilitatea de alimentare: 40000 Square Meters / Month

    Low Cost Stainless Steel Laser Cutting SMT Stencils for PCB Assembly Keywords: Laser Cutting SMT PCB Stencils, Stainless Steel Laser Cutting SMT Stencils, Stainless Steel Laser Cutting PCB Stencils JingHongYi PCB (HK) Co., Limited is a Professional and Top Speed High-quality PCB Manufacturer in China. As The Best PCB...

  • Custom Stainless SMT Soldering PCB Stencil Frame

    Custom Stainless SMT Soldering PCB Stencil Frame

    • Marca: JHY PCB

    • ambalare: Vacuum Anti-Static Carton Packaging

    • Abilitatea de alimentare: 40000 Square Meters / Month

    Custom Stainless SMT Soldering PCB Stencil Frame for EMS PCBA Keywords: Stencil Mesh PCB, Stencil Mask PCB, Stencil Layout PCB JingHongYi PCB (HK) Co., Limited is a Professional and Top Speed High-quality PCB Manufacturer in China. As The Best PCB + PCBA Manufacturer, We Are Your Best Choice. Apart from all types of...

  • Framed Steel Stencil PCB SMT Stainless Steel 58.4*58.4*2.5CM

    Framed Steel Stencil PCB SMT Stainless Steel 58.4*58.4*2.5CM

    • Marca: JHY PCB

    • ambalare: Vacuum Anti-Static Carton Packaging

    • Abilitatea de alimentare: 40000 Square Meters / Month

    Framed Steel Stencil PCB SMT Stainless Steel 58.4*58.4*2.5CM Keywords: Framed Steel PCB Stencil, Framed Stainless Steel PCB Stencil, PCB SMT Stainless Steel Stencil JingHongYi PCB (HK) Co., Limited is a Professional and Top Speed High-quality PCB Manufacturer in China. As The Best PCB + PCBA Manufacturer, We Are Your...

  • SMT PCB Assembly Laser PCB Stencil

    SMT PCB Assembly Laser PCB Stencil

    • Marca: JHY PCB

    • ambalare: Vacuum Anti-Static Carton Packaging

    • Abilitatea de alimentare: 40000 Square Meters / Month

    SMT PCB Assembly Laser PCB Stencil, Laser PCB Stencil for SMT PCB Assembly Keywords: Laser PCB Stencil, Laser PCB Stencil for PCB Assembly, Laser PCB Stencil for PCBA JingHongYi PCB (HK) Co., Limited is a Professional and Top Speed High-quality PCB Manufacturer in China. As The Best PCB + PCBA Manufacturer, We Are...

China PCB Stencil Furnizori

PCB SMT Stencil,the unique goal  is to move solder paste to the bare printed circuit board.


PCB Stencil, SMT Stencil, SMD Stencil, Laser Stencil, What is it?

Apart from all types of Printed Circuit Boards (PCBs) such as Prototype PCB, Aluminum PCB, HDI PCB, Flexible PCB, Rigid Flex PCB, Thick copper PCB, High Tg PCB, JHYPCB also manufactures solder paste stencils to meet Surface Mount Technology (SMT) requirements.

PCB Stencils, also called SMT stencils, SMD stencil, play a key role in transferring accurate amount of solder paste to correct positions on bare circuit boards ready for assembly. In other words, stencils can fast and efficiently ensure the most accurate solder paste amount and optimal electrical connection. With solder stencils, it is possible to use metal squeegee blades to apply solder paste easily over the openings on PCBs and make stencil to be well aligned with the surface of the advanced circuit board.

All of our SMT Stencils stencils are 100% laser-cut type 304 full-hard stainless steel, ensuring the finest quality finish on the market today. We use a .001" laser beam with 98% overlap creating an extremely smooth hole that provides the best paste release. Most stencil fabricators use a .003" laser leaving mouse bites on the aperture edge. You can choose a PCB prototype stencil, a frameless foil stencil, or a rigid permanently mounted stencil. Both the frameless and framed stencils come in various sizes to accommodate your printer and stencil requirements.

PCB Stencil produced by JHY PCB




PCB Stencil Types Available:


1. Laser-cut stencils


The openings are lasered on 100% stainless steel. Generally speaking, this kind of stencil can be produced with high quality and a high degree of precision within a short time.


  • Advantages: high accuracy; barely influenced by objective elements; trapezoid opening beneficial for demoulding; suitable for accurate cutting; reasonable price;


  • Disadvantages: relative low manufacturing speed.

Laser-cut SMT Stencil

2. Chemical-etch stencil


The openings are etched into the metal using acid. Usually this kind of stencil offers better protection on material temper and hardness.


  • Advantages: one-time formation; relatively high manufacturing speed; low cost;


  • Disadvantages: tending to form sand clock shape or large openings; numerous manufacturing stages and accumulating errors; unsuitable for fine pitch stencils; bad for environmental protection.

3. Prototype PCB Stencil (Low-volume manual printing. Ideal for prototypes)

When prototyping dictates fast action with minimal cost, our prototype stencils are the best solution. Prototype Stencils gives you a quality stencil and framework so you can handle assembly from the convenience of your own desk.

Prototype SMT Stencil Features:


  • Eliminate the registration difficulty associated in hand printing with a flat piece of metal
  • Eliminate printer set up for short run prototypes
  • Allow quick alignment for repeatability
  • Save money over full size stencils designed for automated printers<
  • Squeegee included
Prototype SMT Stencil Specs:
Technology 100% laser cut
Material Used Stainless Steel
Stencil Thickness 0.06 ~ 0.3 mm
Minimum Cut Width 0.05 mm
Maximum Size 736 X736 mm
Aperture Tolerance within 0.007mm
Allow for Fiducial Data Yes
Delivery 1 ~2 Day

Prototype PCB Stencil (Low-volume manual printing. Ideal for prototypes)


4. NEW Prototype PCB Stencil Kit (with leaded or lead/free solderpaste)


Includes Prototype Stencil, one board holder, leaded or lead-free solder paste (must specify), temperature marker, squeegee, ESK-safe gloves and alcohol wipe. 


5. NEW Pick and Place Tool


Handy and convenient for low quantity prototype assembly using the Prototype Stencils.  Re-usable, includes vacuum bulb and vacuum clips with diameters of 3/8", 1/4", and 1/8".


6. Framed SMT Stencils (Also called "Glue-in" or Mounted Stencils)


Framed stencils are laser-cut stencils designed for high volume screen-printing. With a framed stencil, your stencil is securely mounted to either a cast or extruded aluminum stencil frame a stencil frame using a mesh border, allowing for complete control.


Framed SMT Stencil Features:


  • Unique Process for smooth aperture walls
  • Very clean laser-cut apertures
  • Excellent print performance
  • Excellent for high-volume stencil printing on printed circuit boards
  • Unique process creates permanent non-removable non-fading fiducial
  • All framed SMT stencils are double bonded to extreme wear
  • 24-hour turnaround standard
Framed SMT Stencil Specs:
Technology 100% laser cut
Material Used Stainless Steel
Frame Types Cast, Space Saver
Stencil Thickness 0.06 ~ 0.3 mm
Minimum Cut Width 0.05 mm
Maximum Size 736 X736 mm
Aperture Tolerance within 0.007mm
Allow for Fiducial Data Yes
Allow for Panelized Data Yes
Delivery 1 ~2 Day

Framed PCB Stencil Specification


Framed PCB Stencil Area

Maximum Squeegee Area

300mm*400mm (11.81inch*15.75inch)

120mm*220mm (4.72inch*8.66inch)

370mm*470mm (14.57inch*18.5inch)

200mm*300mm (7.87inch*11.81inch)

400mm*600mm (15.75inch*23.62inch)

220mm*400mm (8.66inch*15.75inch)

400mm*700mm (15.75inch*27.56inch)

220mm*500mm (8.66inch*19.69inch)

400mm*800mm (15.75inch*31.5inch)

220mm*600mm (8.66inch*23.62inch)

400mm*900mm (15.75inch*35.43inch)

220mm*700mm (8.66inch*27.56inch)

400mm*1000mm (15.75inch*39.37inch)

220mm*800mm (8.66inch*31.5inch)

400mm*1200mm (15.75inch*47.24inch)

220mm*1000mm (8.66inch*39.37inch)

400mm*1400mm (15.75inch*55.12inch)

220mm*1200mm (8.66inch*47.24inch)

420mm*520mm (16.54inch*20.47inch)

240mm*340mm (9.45inch*13.39inch)

450mm*550mm (17.72inch*21.65inch)

270mm*370mm (10.63inch*14.57inch)

500mm*800mm (19.69inch*31.5inch)

320mm*600mm (12.6inch*23.62inch)

500mm*1200mm (19.69inch*47.24inch)

320mm*1000mm (12.6inch*39.37inch)

550mm*650mm (21.65inch*25.59inch)

340mm*440mm (13.39inch*17.32inch)

584mm*584mm  (23inch*23inch)

380mm*380mm (15inch*15inch)

736mm*736mm (29inch*29inch)

480mm*480mm (19inch*19inch)


Framed SMT Stencil



7. Frameless SMT Stencil - Foil/Plate Only (for universal frames)


Foil or Plate Only stencils are designed to work within interchangeable plate or "universal" systems. Also referred to as "reusable", these stencils do not need to be permanently glued into a frame.


Frameless SMT Stencils also referred to as foils are laser cut solder paste stencils designed to work with stencil tensioning systems known as reusable stencil frames. This type of stencil does not need to be permanently glued in a frame. Frameless stencils are significantly less expensive than framed stencils and provide money-saving storage while still delivering superior quality and performance.

Frameless SMT Stencil Features:


  • Reduced storage space requirements
  • Significantly less expensive than framed stencils
  • Excellent for prototype printed circuit board assembly or short runs
  • Smooth aperture walls, can be used for 16 Mil pitch and below and for Micro BGA's
  • 24-hour turnaround standard

Frameless SMT Stencil Specs:
Technology 100% laser cut
Material Used Stainless Steel
Stencil Thickness 0.06 ~ 0.3 mm
Minimum Cut Width 0.05 mm
Maximum Size 280 X 380 mm
Allow for Fiducial Data Yes
Allow for Panelized Data Yes
Delivery 1 ~2 Day

Frameless SMT Stencil


8. Frameless SMT Stencil - Foil/Plate Only (for hand printing)


For times when you need precise control for smaller production runs, our Foil or Plate Only stencils are ideal. These frameless stencils allow you to hand print with precision just the amount you need and can be stored conveniently.


9. Electroformed SMT Stencils


Electroformed SMT stencils are nickel-based, electroform foils permanently mounted in a stencil frame using a mesh border to tightly stretch the stencil foil taut in the frame. Electroformed stencils offer the best paste release characteristics available and are frequently used for fine pitch (20 mil to 12 mil pitch) SMT applications on printed circuit boards. They are also used for µBGA's, Flip Chip, and Wafer Bumping (12 mil to 6 mil pitch).

Electroformed SMT Stencil Features:


  • The smooth trapezoidal sidewalls of an electroformed stencil allow for better paste release
  • Nickel has a lower coefficient of friction compared to stainless steel
  • Electroform foils are harder than full hard stainless steel of comparable thickness, providing for longer stencil life
  • 24-hour turnaround standard

Electroformed SMT Stencil Specs:
Technology Electroforming
Material Used Nickel
Suitable Applications All Component Pitches
Aperture Tolerance within 0.007mm
Stencil Thickness 0.06 ~ 0.3 mm
0.06mm.0.08mm.0.1mm.0.12mm.0.13mm.0.15mm.0.18mm.0.2mm.0.3mm
Positional Accuracy ± 0.008mm
Delivery 1 ~2 Day



What's the difference between a framed stencil and a frameless stencil?


A framed PCB stencil will have a 0.5" to 1.5" thick metal frame around it, similar to a picture frame. Framed stencils are often used by contract manufacturers, assembly and board houses, and large scale production facilities and are commonly placed in a manual or automated stencil printing machine. Frameless stencils are a thin sheet of material cut with a small border around your design. For example pictures on these products, please visit our Gallery.


What's the difference between Polyimide and Stainless Steel?


All stencils are made with high quality Polyimide and Stainless Steel. We use only the industry leading Stainless Steel, designed specifically for stencils. These materials are ideal for prototype or multilayer PCB.

Stainless Steel: 0.0007" Laser spot size, 0.001" minimum aperature size.
Polyimide Film: 0.003" Laser spot size, 0.005" minimum aperature size.

Polyimide has a lower precision rate due to the way it is processed and its ability to withstand heat during the cutting process. Minor variances will occur when the material reacts to the laser. Paste release is great, but this material should be limited to a small number of uses and with components 0402 or bigger.

The minimum aperature size for Polyimide is 0.005" vs 0.001" for Stainless Steel. Polyimide also has a natural curl in the material caused by the way the film is manufacturered, this is outside of our control. Stainless Steel provides the ultimate in precision and quality, with a 0.0007" spot size, and exceptional paste release with a truly flat surface. If you want the absolute best reflow experience, there is no comparison, Stainless Steel is the superior material.


Analysis and Treatment of Common Problems in PCB SMT stencil


  • Insufficient solder paste
Insufficient solder paste may cause poor bonds and contact between components and the board. The common causes of insufficient solder paste are poor gasketing, clogged stencil apertures, insufficient solder paste bead size, paste/stencil being used beyond recommended life span, stencil not wiped clean, or low squeegee pressure.

  • Smudging/bridging
The main causes of smudging/bridging are excessive squeegee pressure, inadequate stencil wiping, poor contact between the board and stencil, high temperature or humidity, or low solder paste viscosity.

  • Misalignment print
A typical misalignment print is usually caused by the vision system not spotting fiducials, PWB or stencil stretch, poor contact between the board and the stencil, or weak board support.

  • Bow and twist
A PCB board not fixed properly during solder paste printing gives poor results and increases soldering related issues. Normally, solder paste printing equipment can handle warpage of 1.0 to 3.0 mm but beyond this limit needs some special jigs or fixtures to hold the PCB. It may be difficult to tackle thick and small boards compared to thin and bigger size boards.


How to Determine Stencil Size?


Stencil size is composed by two parts: internal size and overall size. Internal size is the size compatible with that of PCB ready to be assembled while overall size refers to the size compatible with printer parameter limit. As long as both sizes are accurately designed, stencil will be able to make full use of its functions.

How to Determine Stencil Size

Internal size of stencil can be figured out conforming to the following rule:
  • Width of Framed Stencil = width of PCB + 100mm while its Length = length of PCB + 100mm
  • Width of Frameless stencil = width of PCB + 200mm while its Length = length of PCB + 200mm

For example, if one circuit board size is 50*50mm, then the size of its framed stencil should be around 150*150mm and the size of its frameless stencil should be around 250*250 mm.

It's easy to remember and operate so it worked for manual solder paste printing in SMT assembly prior to the advent of automatic printer. It can be said that different PCB sizes lead to generations of different internal sizes of stencil.

When it comes to automatic solder paste printer, however, it's relatively solid. Overall size of stencil has to be determined by parameter limit of the equipment, that is, printer, because stencil has to work within the range of printer with a frame. Different printers feature different parameter regulations. As far as PCBCart is concerned, the stencil size compatible with our printer can be either 650mm*650mm or 736mm*736mm.

PCB designers have to focus on internal size of stencil, they don't need to care about its overall size since it is generally determined by the parameters of printer in your contract assembler workshop.



How to Use PCB SMT Stencils?




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