6 Layer Half Hole Printed Circuit Board , With Blind And Buried Holes , ENIG

6 Layer Printed Circuit Board With Blind And Buried Holes

PCB Specifications:

Layer Count: 6Layer Half Plated Hole PCB

Board Thickness: 1.2MM

Material: FR4 NY3150A

Min Hole: 0.1MM

Min Line: 3/3 Mil

BGA Size: 8Mil

Unit Size: 90MM*60MM/20UP

Blind Holes: L1-L2 , L5-L6 0.1MM

Buried Holes: L1-L6

Solder Mask: Green

Surface Treatment: ENIG

Special Treatment: Half Plated Holes

Application: GPS Module

PCB Flow Chart:

FAQ:

Question: What is the most common quality issue for this kinf of pcb?

Answer: 1) Copper burr in half holes

2) Oxidation in half holes

Question: Why use surface treatment ENIG+OSP?

Answer: OSP has good tin solder paste feature . The BGA size is only 8mil. If use immersion gold, it's not good for tin solder paste. So we suggest customer to use ENIG+OSP. It can protect other pads well and meanwhile, it makes sure that the BGA pads have good tin solder paste feature.

Question: Is the cost for ENIG+OSP higher than ENIG?

Answer: Yes it is. But it won't make a big difference.

Quesion: What is the Silkscreen in a PCB?

Answer: The Silkscreen is the top layer of a Printed Circuit Board (PCB) which is used as a reference indicator for placing components on a PCB Board. It requires a specifically formulated ink whose standard color is white, but it can also be Red, Black, Yellow, Blue and a number of other colors.

The silkscreen is used to specify useful information on the PCB board that can help/assist users during assembly. It is used to mark component values, part numbers, test points, polarity etc.

What is the purpose of using a silkscreen layer?

The silkscreen is not applied to PCB boards by default. A customer has to ask for this and there is usually an additional charge for applying a silkscreen on the board. Here are some important benefits to opt for the silkscreen layer:

• It helps the engineers and technicians identify test points on the PCB board. This way they know where to take measurements from and helps when trouble shooting.
• It can can be used to outline where components need to be placed on the board, this way users will not users forget to place components on the board.
• The silkscreen coating also helps with the warning symbols which are generally used to indicate the higher parameter values such as Voltage, Current and Power.
• It can be used to specify values of inductors, resistors and other components reducing the probability of placing a component with an incorrect value on the board.
• Acts as a reference indicator to identify the component type and polarity orientation.

There are three main ways to add a silkscreen coating on a PCB board:

• Manual screen-printing: This is a process which can be used when line widths are greater than 7 mm and the registration tolerance is 5 mm.
• Liquid Photo Imaging (LPI): This process provides more accuracy and legibility over manual screening and is used when line widths are greater than 4 mm
• Direct Legend Printing (DLP): This is the most accurate way of adding a silkscreen, however it is very expensive.

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.