How to choose the thickness of stencil?
Stencil thickness should meet the minimum spacing QFP, BGA , taking into account the smallest chip components.
QFP pitch≤0.5MM , stencil thickness 0.12mm; QFP pitch>0.5MM, stencil thickness 0.15mm-0.18mm ; BGA pitch>1.0mm , stencil thickness 0.15mm , 0.5mm≤BGA pitch≤1.0mm, tencil shim thickness 0.12mm .(Refer to the table below)
| Item | Space | Stencil Thickness |
|---|---|---|
| CHIP | 0402 | 0.12mm |
| 0201 | 0.10mm | |
| QFP | 0.65 | 0.15mm |
| 0.50 | 0.13mm | |
| 0.40 | 0.12mm | |
| 0.30 | 0.1mm | |
| BGA | 1.25-1.27 | 0.15mm |
| 1.00 | 0.13mm | |
| 0.50-0.80 | 0.12mm | |
| PLCC | 1.25-1.27 | 0.15mm |