4 Layer PCB With Half Plated Holes Used In GPS Module

Board Requirements:

1. Board Laminate:

Board layers 4 layer see layer stackup

Board material laminate should be 0.031inch +/-10%

Finished glass epoxy laminate, type nema grade or equivalent

Outer layer to be 0.5OZ Copper clad

Construction should meet class 94v-0

Layer construction alignment max: +-0.05mm

2 Holes:

Copper plate through all holes with a minimum wall thickness of 0.0254mm

Register tolerance : +-0.015mm

All holes must be drilled +-0.051mm with respect to center of drilled pad

3 Solder mask:

Liquid photo-imageable solder mask over bare copper per IPC-SM-840,TYPE B,CLASS3

4. Finish:

4.1 Copper plated through all holes

4.2 All other exposed conductive pattern areas not covered with solder mask shall be plated with ENIG(ELECTROLESS NICKEL IMMERSION GOLD) at a minimum of 0.05 micron thickness of hard gold over 3.0 to 6.0 micron thick electroless nickel plating

5 Board outline can not be violated. Board outline shall be free from tough edge, mouse bite etc.

6 This pcb must comply with the material restrictions for ROHS directive 2011/65/eu and amending directive 2015/863.

Witgain Technology Limited was established in 2007. Factories locate in HuiZhou City and marketing locates in ShenZhen City. The total area of two factories is around 10000 square meters. We can offer 2-layer and multi-layer pcb services to our customers, highest to 24 layers and rigid-flex pcb, ceramic pcb, HDI pcb, heavy copper pcb are also included. To meet our customer's diversified demands, we also accept prototype orders, small batch orders and big batch orders. Quality and technology is what we value most and we will never stop improving our capabilities. Our customers' satisfaction is always what we are seeking for.