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When we say SMT stencils, it refers to the mold that used for PCB assembly or SMT. There are SMT stencils or glue-in stencils which are laser-cut solder paste stencils permanently mounted in a stencil frame using a mesh border to tightly stretch the stencil foil taut in the frame.
Classification of stencils
1.Non electro-polished Laser cut stencils.
This stencil is the most common used in PCB assembly industry. This kind of stencil can be in high precision and cost will be not expensive. If there’s non BGA or QFP package, this one can be used for most PCB boards.
2.Electro-polished laser cut stencils.
Electro-polished stencil, also know as electrochemical deburring stencil is used for fine pitch.
If there is BGA or QFP package, it is better to use this one instead of laser cut stencils. Using electropolishing elicits a significant improvement in printing, particularly for very small pad apertures, as solder paste is distributed better thanks to the smoothed walls.
3.Step SMT stencils
Step-up and step-down stencils have been used in PCB industry for more than a decade. This is really helpful for integrating mixed components with different paste requirements onto a single PCB. Linked Electronics can make a step-up and step-down stencils with many different thickness onto one stencil, that is 0.08mm 0.1mm 0.12mm 0.15mm 0.2mm 0.25mm 0.3mm.
4.Nano coating stencil
Electronics devices is getting much smaller and more dedicated and many new package are now appear, BGA COB, which has the pin space less than 0.4mm. This is really a big challenge for the PCB assembly.And the traditional technique cannot meet the requirement. Thanks to the nano coating stencils made by Linked Electronics
It increases paste transfer efficiency. NanoSlic Gold is applied using a proprietary application process, thermally cured and bonded to the stencil surface and aperture walls. For nano coating stencils, less clean job required and greatly reduce the quality issue for the PCB assembly work.
Product Details:
Payment & Shipping Terms:
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| Product Name: | Laser Cut Stainless Steel Stencil | Size: | 300*400mm |
|---|---|---|---|
| Thickness: | 0.15mm | Lead Time: | 5 Working Hours |
| Frame: | Yes | Electro-Polished: | Yes |
| High Light: | pcb solder stencil,stencil for pcb assembly |
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PCB Assembly Frame SMT Stencil Laser Cut 300mm*400mm for PCBA
Linked Electronics has the capability to manufacture pcb from single sided boards up to 32 layer multilayers ,and provide one stop turnkey services, including pcb manufacture, assembly, components source and function testing. The superior service we offer tp our customers is the key to our success and our mission has remained the same since 1998. And our commitment is to surpass customer's satisfaction all the time.
Linked offers nano coating on select stencils and sizes! "Nano coating” is a two part, wipe on process, made up of hydrophobic elements that repel flux and solder, resulting in improved paste release for extremely small components. If you have fine pitch QFN’s, fine pitch IC’s, micro BGA’s, and 0201 component types on your designed PCB or PCBA boards, nano coating stencil must be the best option for you, but the price will be more expensive than standard stencil
Linked One Stop PCB Service
1. PCB manufacturing
2. Components Souring
3. PCB Assembly Service
Look forward to your RFQs and hope we can work together.
Stencil Thickness Advise by Linked Electronics
QFP pitch ≤ 0.5mm, the sheet thickness choice could be either 0.13mm or 0.12mm;
If the pitch> 0.5mm, the stencil thickness can be between 0.15mm - 0.20mm;
If the BGA ball pitch > 1.0mm, 0.15mm thickness stencil is a good option
If the 0.5mm≤BGA ball pitch ≤1.0mm, choose 0.13mm thickness for your SMT work.
You can order one stencil with your PCB order at Linked Electronics. We have different thickness
and different size stencil showing below
Stencil Option at Linked Electronics
| Stencil Size(unit mm) | Actual Area( unit mm) | Weight(KG) |
| 370×470 | 190×290 | 1.5KG |
| 300×400 | 140×240 | 1KG |
| 420×520 | 240×340 | 2KG |
| 450×550 | 270×370 | 2KG |
| 584×584 | 380×380 | 3.5KG |
| 550×650 | 350×450 | 3.5KG |
| 736×736 | 500×500 | 5.5KG |
| 400×600 | 220×400 | 2.5KG |
| 400×800 | 220×600 | 3.5KG |
| 400×1000 | 220×760 | 4KG |
| 400×1200 | 220×1000 | 6KG |
| 400×1400 | 220×1200 | 7KG |
| 500×700 | 320×500 | 3.5KG |
| 500×800 | 320×600 | 3.5KG |
| 500×1200 | 320×1000 | 7KG |
| 500×1400 | 320×1200 | 7.5KG |
| 500×1500 | 320×1300 | 8KG |
| 280*380 Framelss Stencil | As per your request | 1KG |
Opening Hole Design for Stencil
| Component Type | Pitch | Soldering Width | Soldering Length | Opening Width | Opening Length | Shim Thickness |
| PLCC | 1.27mm | 0.65mm | 2.00mm | 0.60mm | 1.95mm | 0.15-0.25mm |
| QFP | 0.635mm | 0.35mm | 1.50mm | 0.32mm | 1.45mm | 0.15-0.18mm |
| QFP | 0.50mm | 0.254-0.33mm | 1.25mm | 0.22-0.25mm | 1.20mm | 0.12-0.15mm |
| QFP | 0.40mm | 0.25mm | 1.25mm | 0.20mm | 1.20mm | 0.10-0.12mm |
| QFP | 0.30mm | 0.20mm | 1.00mm | 0.15mm | 0.95mm | 0.07-0.12mm |
| 0402 | 0.50mm | 0.65mm | 0.45mm | 0.60mm | 0.12-0.15mm | |
| 0201 | 0.25mm | 0.40mm | 0.23mm | 0.35mm | 0.07-0.12mm | |
| BGA | 1.27mm | 0.80mm | 0.75mm | 0.75mm | 0.15-0.20mm | |
| BGA | 1.00mm | 0.38mm | 0.35mm | 0.35mm | 0.10-0.12mm | |
| BGA | 0.50mm | 0.30mm | 0.28mm | 0.28mm | 0.07-0.12mm | |
| Flip Chip | 0.25mm | 0.12mm | 0.12mm | 0.12mm | 0.12mm | 0.08-0.10mm |
| Flip Chip | 0.20mm | 0.10mm | 0.10mm | 0.10mm | 0.10mm | 0.05-0.10mm |
More Pictures of Laser Cut Stencil
Contact Person: Mr. Jonathan
Tel: +86 755 2553 8256
Fax: 86-755-61658416
