Milkymist One SMT/DIP Process Flow

Here collected info is came from visiting smt factory during producing Milkymist One RC1 pcba.

• Auto/Semi-Auto PCB Carrier Machine

• Solder Paste Print

• Produce Stencil

Stencil is a material for the process of printing soldering paste of smt stage. There are two methods to produce stencil: One is made by geber file, the other is made by pcb optical scanning.

 by gerber file: the smt factory will request customer to get final gerber file which is exact mapping with instant pcb produced from pcb maker not from customer's routing files. This approach is more significant to mass production without much variable tolerances.

 by optical scanning: the smt factory also can use the instant pcb sample to let stencil maker to do a scan to copy and produce it.

For Milkymist One RC1 we make this by file which is brought from New Heart Corporation. Thus is also this time RC1 pcb maker. For an EMS or SMT business, they almost frequently build oriented-business with stencil makers like http://www.cksmt.com.tw or http://www.laser.com.tw/. In Taiwan for example the quotation about pcba assembly including outsourcing stencil made on smt factory side.

• Pick and Placement

 high speed AI machine

 medium speed AI machine

 low speed AI machine

• IPQC

• Inspection before IR-Reflow

• IR-Reflow Measurement

• IR-Reflow

• Through Holes Insertion (DIPs Process)

• OQA