7mil Min BGA Thick 1.0MM ENIG RO4350B 2 Layer PCB

2 Layer Rigid Printed Circuit Board , High Frequency Rogers RO4350B Material

PCB Specifications:

Layer Count: 2 Layer Rigid PCB

Material: RO4350B Quick-Reference-Processing-Guidelines-RO4003C-RO43...

Board Thickness: 1.0MM

Min Hole: 0.5MM

Unit Size: 109MM*92MM/1SET

Surface Treatment: ENIG

Capabilities:

FAQ:

Question: What is PCB Etch Factor?

Answer: PCB Etch Factor or etch compensation is an etching process modification used by the PCB manufacturers to decide the extent and accuracy of etching. It helps the designers and manufacturers decide the minimum etching allowance on the track width. During etching, unwanted copper is removed gradually from the PCB surface to realize the desired conductive track. For instance, if a PCB design requires a track width of 0.25 mm, then the manufacturer has to initiate etching if the track width is more than 0.25 mm. The amount by which the track width is increased is called etch factor. It is proportional to the copper weight required to be removed. More copper to be removed indicates a higher value of the etch factor.

No etching process gives perfect straight cuts, they always create undercut, an etching defect, which can be seen in the figure below.

In mathematical terms, an etch factor is the ratio of track width to the amount of undercut. The PCB CAD designer has to provide enough spacing in the design so that a manufacturer is able to utilize that space to start etching with a little wider track. The minimum spacing in the design must meet the manufacturer’s decided minimum space.

Witgain Technology Ltd was established in 2007 in ShenZhen City. After over 10 years development, the company now posses two factories. One factory located in HuiZhou City which is near to ShenZhen. The other one locates in JiangXi Province. Marketing dept still locates in ShenZhen City.

We have about 300 employees in two factories and the monthly output is around 30000m2. Our marketing orientation is to make high difficult and special treatment pcb. Even though, we still accept normal 2-layer and multi-layer pcb orders. Our products cover simple double layer pcb, multi-layer pcb, HDI pcb, rigid-flex pcb, fpc, ceramic pcb, heavy gold/copper pcb etc. Wide product ranges and flexible order quantities allow us to satisfy most customer's demands.

Quality and technology is what we value most and we will never stop improving our capabilities. Our customer's satisfication is always what we are seeking for.