our products

D&Q Mining is a high-tech company integrating R&D, production and sales. It provides mature products and solutions such as crushers, sand making, milling equipment, mobile crushing stations, etc., for aggregate, mining and waste recycling.

immersion gold technology in nepal

An Overview of Immersion Gold ENIG Surface Finish for PCBs

Jun 20, 2017· Advantages of Immersion Gold Finish. Although ENIG is an expensive surface finish technology, still it is popular due to the following reasons: Immersion gold has strong chemical properties. These properties include impressive wettability, surface planarity, coplanarity, and long shelf life. The properties are contributed by nickel and gold layer.

More

Immersion Gold Coatings, Surface Analysis ECI Technology

Peter Bratin, Michael Pavlov and Eugene Shalyt ECI Technology, Totowa, NJ, USA ABSTRACT Immersion gold coating is a one of the major metallic alternative finishes used to replace tin/lead hot air finish. The immersion process provides flat coating over the substrate and do not introduce any lead into the solder joint. Both these features make []

More

Electroless Gold & Immersion Gold EPNER TECHNOLOGY INC.

Epner has taken its 50 years of electroless nickel plating experience and applied it to develop a proprietary Electroless and Immersion gold plating process involving extreme electron manipulation. Each job requires a custom chemistry set up depending on the requirements of the plating. Sometimes just a small beaker is enough, other times large tanks are

More

Electroless nickel immersion gold Wikipedia

Electroless nickel immersion gold (ENIG) is a metal plating process used in the manufacture of printed circuit boards (PCBs), to avoid oxidation and improve the solderability of copper contacts and plated through-holes.It consists of an electroless nickel plating covered with a thin layer of gold, which protects the nickel from oxidation.The gold is typically applied by quick immersion in a

More

New Immersion Gold Technology for Uniform Au Thickness

New Immersion Gold Technology for Uniform Au Thickness Distribution Jian Zhang*, Ivan Hsu^ and Crystal Li* Rohm and Haas Electronic Materials Asia Ltd (a Member of The Dow Chemical Company) 15 On Lok Mun Street, On Lok Tsuen, Fanling, N.T. Hong Kong* Rohm and Haas Electronic Materials Taiwan Ltd., The Dow Chemical Company

More

IPC-4552 for ENIG Final Finish

Electroless Nickel/Immersion Gold (ENIG) per IPC-4552, or follow table below: Note: IPC cautions that gold thickness above 4.925 µ" can indicate increased risk of having compromised the integrity of the nickel undercoat due to excessive corrosion.

More

Printed Circuit Boards. 14. 2 Surface Finish: Immersion Gold

The "PCB production technology" film is created for electronic engineers and electronic designers. It demonstrates the multilayer PCB production process at R...

More

New immersion gold technology for uniform Au thickness

Oct 28, 2016· Our new immersion gold technology can effectively reduce the galvanic effect by introducing a new chemical system. The electropotential differences were minimized among pads with various surface areas or connected to different inner-layer copper areas thus providing a uniform gold deposition. Meanwhile, the plated Au thickness can be steadily

More

Comparison of ENIG and ENEPIG on techniques, advantages

Newly-developed immersion gold technology not only reduces corrosion on nickel surface, but helps decreasing cost as well. Compared with immersion gold solution (pH=4.5-5.5) of last generation, new-generation immersion gold solution is close to be neutral with a pH value in the range from 7.0 to 7.2.

More

Electroless Nickel Electroless Palladium Immersion Gold

immersion gold plating process (Ni/Pd/Au) offers a cost-effective alternative to meeting today’s highest technology demands. This layer combination of thin pure palladium covered by a flash of gold provides a coplanar surface that is both solderable and wire-bondable (gold and aluminum). The proposed

More

Electroless nickel immersion gold Wikipedia

Electroless nickel immersion gold (ENIG) is a metal plating process used in the manufacture of printed circuit boards (PCBs), to avoid oxidation and improve the solderability of copper contacts and plated through-holes.It consists of an electroless nickel plating covered with a thin layer of gold, which protects the nickel from oxidation.The gold is typically applied by quick immersion

More

Electroless Nickel Electroless Palladium Immersion Gold

immersion gold plating process (Ni/Pd/Au) offers a cost-effective alternative to meeting today’s highest technology demands. This layer combination of thin pure palladium covered by a flash of gold provides a coplanar surface that is both solderable and wire-bondable (gold

More

Comparison of ENIG and ENEPIG on techniques, advantages

Newly-developed immersion gold technology not only reduces corrosion on nickel surface, but helps decreasing cost as well. Compared with immersion gold solution (pH=4.5-5.5) of last generation, new-generation immersion gold solution is close to be neutral with a pH value in the range from 7.0 to 7.2.

More

Immersion Gold PCB by Polaris Technology Co.,Ltd

Immersion Gold PCB by Polaris Technology Co.,Ltd at Pakbiz a premier Business to Business marketplace and largest online business directory. Find Immersion Gold PCB from China complete basis & contact information, business offers, availability & related Textile Products products. This page gives you information about the authentic sellers

More

China 4-layer immersion gold PCB with TG180 on Global Sources

China Immersion gold PCB VIC-4A023 is supplied by Immersion gold PCB manufacturers, producers, suppliers on Global Sources We use cookies to give you the best possible experience on our website. For more details including how to change your cookie settings, please read our

More

PCB Gold Fingers Specifications & What You Should Know

Dec 05, 2018· Moreover, gold fingers have allowed industries to become more productive and capable than ever before. As increasing amounts of technology rely on gold fingers, it is crucial to have them plated and tested to the highest standards. Only this way can you ensure maximum performance without fail from the tech products that use circuit boards.

More

(PDF) Electroless and Immersion Plating Process towards

The immersion plating is a displacemen t process where the metallic ions in the solution will be reduced on the surface substrates [7]. Immersion silv er (ImAg) is one of important surf ace finish

More

IPC-4556 -ENEPIG Plating for PCB

IPC-4556 Electroless Nickel / Electroless Palladium / Immersion Gold ENEPIG Plating This specification sets the requirements for the use of Electroless Nickel/Electroless Palladium/Immersion Gold (ENEPIG) as a surface finish for printed boards.

More

An Overview Of Mining, Mines And Minerals In Nepal

Department of Mines and Geology completed regional geological map of Nepal. Seismic survey has been carried out in Terai area and some of the blocks were leased for oil exploration. More searched terms: gold mining in Nepal, coal mining in Nepal, limestone mining in Nepal, quartz mining in Nepal, sand mining in Nepal, Mines and Minerals in Nepal

More

China Immersion Golden PCB 3U" Board from Shenzhen

Immersion Golden PCB 3U Board VIC-V006 Min. Order: 1 Piece FOB Price: US$ 1.5 US$ 50 supplied by Shenzhen Victory Electronic Technology Co., Ltd on Global Sources

More

PCB Surface Finishes Introduction and Comparison PCBCart

HASL, ENIG/ENEPIG, Immersion gold and Immersion Tin all belong to metallic surface finishes while OSP and Carbon ink belong to organic surface finish. • HASL (Hot Air Solder Leveling) HASL is a conventional type of surface finish applied on PCBs. The PCB is typically dipped into a bath of molten solder so that all exposed copper surfaces are

More

China immersion gold blind hole exporter,factory green OSP

Dec 18, 2017· 12l 6oz 3-3mil Immersion Gold Blind Hole Board,8l Impedance 4-4mil Osp Board,4l Buried Hole Gold-finger Circuit Board,2l 1oz Fr4 Osp Board,10l Fr4 4-4mil Immersion Gold Board,8l Red Immersion Gold Printed Circuit Board,8l Thickness1.2mm Fr4 Immersion Gold-osp Circuit Board,6l Blue Metal Core Board,4l 0.5oz Rogers Black Immersion Gold Board,6l Carbon-osp Immersion Gold

More

China Immersion Golden 3U" PCB from Shenzhen Wholesaler

Immersion Golden 3U PCB VIC-ML008 Min. Order: 1 Piece FOB Price: US$ 1.5 US$ 50 supplied by Shenzhen Victory Electronic Technology Co., Ltd on Global Sources

More

What is Che Ni/Au or ENIG? Technical Terms by Eurocircuits

Che Ni/Au or ENIG is a chemical process, applied after solder mask that adds 3-6µm Nickel before adding between 0.065µm and 0.10µm Gold onto the copper. To protect the solder pads for oxidation and to make the copper better solder able we can apply ENIG, Electro less Nickel Immersion Gold or also called Che Ni/Au, chemical nickel gold or

More