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Double Sided Hard Gold Plating PCB

2 layer hard gold plating circuit board 1.product show 4L Rogers+FR4 mix pressing, 1.6mm ENIG 4L Flex-Rigid board 1.6mm, ENIG 6L two step HDI, 0.1mm Dia. Hole size, ENIG+partial BGA with OSP 4L Alu. Based board, 1.6mm, HAL Uniwell circuits is a professional PCB manufacturer in China, we offer a...

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2 layer hard gold plating circuit board
1.Product show

图片68_副本.jpg 

Specification:
Layer: 2
Board Thickness: 1.56 mm
Surface treatment:hard gold plating.
Material: FR4.
Min line width/line distance:25/20mil
Min hole:0.5mm

Uniwell circuits is a professional PCB manufacturer in China, we offer a variety of customized PCBs with HASL, Lead free HASL, ENIG, Immersion silver/Tin, OSP surface treatment. 

Uniwell circuits provide two kinds of gold finish: Electroless Nickel Immersion Gold (ENIG) as a surface finish for the whole PCB, and hard plated gold over plated nickel for edge-connector fingers. Electroless gold gives excellent solderability, but the chemical deposition process means that it is too soft and too thin to withstand repeated abrasion. Electroplated gold is thicker and harder making it ideal for edge-connector contacts for PCBs which will be repeatedly plugged in and removed.

2.Our customers
With  10+ years’experienced and skilled management, consistent high quality, proprietary production techniques and professional service, that makes Uniwell Circuits win high recognition from customers throughout the world, including Mainland China, Taiwan, USA, Japan, Russia, Germany, Switzerland, Sweden, UK, Finland, France, Holland, Italy, Poland, Denmark, Australia, Brazil, Singapore, Thailand, and Malaysia.

图片69_副本.jpg

3.Our lead time
Uniwell offer quick turn service.1-2 layer in 24 hours, 4-6 layer in 48 hours, you can take it as a reference .

Layers

Quick-turn

Sample order

Mass order

single

24 hours

3working days

7working days

double

24 hours

4working days

7working days

4-6layer

48hours

5-6working days

10working days

8-12layer

120hours

7-9working days

15working days

FR-4 based, Exclude material lead time

4.Do you know the difference between immersion gold and gold plating
Gold plating: Gold plating is a method of depositing a thin layer of gold onto the surface of another metal through plating way. The gold particles attached to the pcb, as strong adhesion also known as hard gold. The gold finger of memory bank is hard gold and abrasion resistant.
Immersion gold: Immersion gold through chemical reaction to make gold particles attached to pcb. As weak adhesion it is also known as soft gold.

Why use gold plating?
As IC become more and more integrated and IC pins are also denser. This brings difficulty to SMT placement. In addition, the shelf life of the HASL board is very short, so gold plateing board solves these problems:    
However, as the circuit lines become denser and it brought short circuits. And as the frequency of the signal become higher, the effect of the skin that affect signal quality become more obvious.
Skin effect: High-frequency alternating current, the current will tend to concentrate on the surface of the wire. 

Why use immersion gold?
In order to solve the above problems of the gold plating board, so adopt immersion gold technology:
1)Due to the difference of crystal structure between Immersion Gold and Gold Plating, Immersion Gold is easier to weld than Gold Plating and will not cause bad welding. The stress is more easily to control.
2)Since only pads has nickel-gold, the signal transmission in the copper layer in skin effect and will not affect the signal.
3)Not easy to oxidation.

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