Immersion silver PCB is a printed circuit board which surface finish is coated by immersion silver, immersion siliver is most used for aluminum wire bonding, metallic dome contacts, and EMI shielding. The thickness of immserion silver is 5 micro inches to 12 micro inches, and is can be store for at least 12 months.
In order to meet the urgent requirements of the electronics industry for banning lead, the PCB industry is gradually moving surface treatment from HASL to other finishes, such as immersion silver, immersion tin, immersion gold, and OSP. Immersion silver is a new surface treatment technology with excellent performance at a reasonable cost, which is considered the best choice.
As a new environmentally-friendly surface treatment process, immersion silver is plated 6-18u” thick on the copper surface to ensure reliable soldering of electronic components on the circuit board. The immersion silver process is based on the displacement reaction between the silver ions in the solution and the metal copper on the printed circuit board. After the copper surface is micro-roughened by the micro etching solution, a uniform immersion silver layer can be slowly formed at a controlled silver deposition speed.
The slow silver immersion speed is conducive to depositing a dense crystal structure, forming a high-density silver layer, and avoiding particle growth due to precipitation and agglomeration. The immersion silver solution is very stable, has a long service life, and is insensitive to light and trace halides.
Immersion silver is cheaper than immersion gold. If the PCB has functional connection requirements and needs to reduce costs, immersion silver is a good choice. What is more, immersion silver has good flatness and contact; it is better to choose immersion silver technology. It has been widely used in communication products, automobiles, computer peripherals, and high-speed signal design. It can also be used in high-frequency signal design because of its excellent electrical properties. EMS recommends the immer.
1. PCB fabrication.
2. Turnkey PCBA: PCB+components sourcing+SMD and through-hole assembly
3. PCB clone, PCB reverse engineering.
PCB or PCBA Files Requests:
1. Gerber files of the bare PCB board
2. BOM (Bill of material) for assembly (please kindly advise us if there is any acceptablecomponents substitution.)
3. Testing Guide & Test Fixtures if necessary
4. Programming files & Programming tool if necessary
5. Schematic if necessary
Global Well Electronic Inc. is a professional PCB solution supplier from Shenzhen, China, integrating PCB circuit board production and processing, STM processing and mounting, PCBA OEM, component purchasing, PCB/PCBA custom design-production- A comprehensive PCB circuit board company with one-stop turnkey service of processing-assembly-finished products. The company has a strong supply chain system, a professional and efficient collaborative team, a sound and complete quality control system, and the business philosophy of honesty and trustworthiness, customer first, and presents the products to everyone with low prices, reliable quality, high-quality service and after-sales service. client.
We provide total PCB solutions from PCB design to final mass production, including PCB fabrication and assembly, component sourcing, solder paste stencils, conformal coatings, and more. Serving the global electronics field, including industrial control, medical electronics, military equipment, power communication, automotive electronics, AI artificial intelligence, smart home and other industries.
Our factory located in Shenzhen, and have almost 300
employees, more than 30 production lines include SMT, DIP, automatic welding, aging test and assembly. We have SMT machines from Japan and Korea, automatic solder paste printing machines, solder paste inspection machine(SPI)12 temperature zone reflow soldering machine, AOI detector, X-RAY detector, wave soldering machine, EM PCB ,dispenser,laser print machine etc., Different line configurations can meet requirements from small sample order to bulk shipment.
Our company has obtained ISO 9001 quality system certification and ISO 14001 system certification. With multi-testingprocedures, our products carry out the quality system standard strictly.
5.PCB Technical Specification
| Order Quantity | 1-300,000,30000 Square Meter/Square Meters per Month module electronic board |
| Layer | 1,2,4,6,upto 24 layer |
| Material | FR-4,glass epoxy,FR4 High Tg,Rohs compliant,Aluminum,Rogers,etc |
| PCB type | Rigid,flexible,rigid-flexible |
| Shape | Any shape: Rectangular,round,slots,cutouts,complex,irregular |
| Max PCB dimensions | 20inch*20inch or 500mm*500mm |
| Thickness | 0.2~4.0mm, Flex 0.01~0.25'' |
| Thickness tolerance | ± 10% |
| Copper thickness | 0.5-4 oz |
| Copper thickness tolerance | ± 0.25oz |
| Surface finish | HASL,Nickle,Imm Gold,Imm Tin,Imm Silver,OSP etc |
| Solder mask | Green, red,white,yellow,blue,black, Double-sided |
| Silk screen | White,yellow,black,or negative, Double-sided or single-sided |
| Silk screen min line width | 0.006'' or 0.15mm |
| Min drill hole diameter | 0.01'',0.25mm.or 10 mil |
| Min trace/gap | 0.075mm or 3mil |
| PCB cutting | Shear,V-score,tab-routed |
(2) Turnkey PCBA Capabilities
| Turnkey PCBA | PCB+components sourcing+assembly+package |
| Assembly details | SMT and Thru-hole, ISO lines |
| Lead Time | Prototype: 15 work days. Mass order: 20~25 work days |
| Testing on products | Flying Probe Test, X-ray Inspection, AOI Test, functional test |
| Quantity | Min quantity: 1pcs. Prototype, small order, mass order, all OK |
| Files we need | PCB: Gerber files(CAM, PCB, PCBDOC) |
| Components: Bill of Materials(BOM list) | |
| Assembly: Pick-N-Place file | |
| PCB panel Size | Min size: 0.25*0.25 inches(6*6mm) |
| Max size: 20*20 inches(500*500mm) | |
| PCB Solder Type | Water Soluble Solder Paste, RoHS lead free |
| Components details | Passive Down to 0201 size |
| BGA and VFBGA | |
| Leadless Chip Carriers/CSP | |
| Double-sided SMT Assembly | |
| Fine Pitch to 0.8mils | |
| BGA Repair and Reball | |
| Part Removal and Replacement | |
| Component package | Cut Tape,Tube,Reels,Loose Parts |
| PCBA process |
Drilling-----Exposure-----Plating-----Etaching Stripping-----Punching-----Electrical Testing-----SMT-----Wave Soldering-----Assembling-----ICT-----Function Testing-----Temperature - Humidity Testing |
Packing details:
PCBA are packed into plastic bags. Plastic bags are put into small carton. 4 small carton into a big carton.
A big carton: 35×32×40 cm size.
Shipping Express:
FedEx, DHL, UPS, TNT, EMS, private lines, etc.
Air freight, Sea shipping
If you need help on PCB layout, you can contact us and send the board to us. We also provide Reverse Engineering Service.
We have been providing PCB Manufacture for many years in China,and we have rich experience in product production and product assembly.We believe our team will provide high quality and low cost service for you.
Thank you very much for all your support .
Best Regareds.
Q:What is needed for PCB/PCBA quotation?
A: For Bare PCB project quotation:
Please provide Quantity, Gerber file and specification include PCB material,Size, surface finish treatment, copper thickness,
board thickness, soldermask color and silkscreen color ,HASL or HASL-LF and other special specs.
For PCBA project quotation:
Please provide above information as well, and BOM list.If you need turnkey service include programming and functional testing etc, kindly contact us for more details.
Q:Are my design files secure when I send them to you?
A:We warranty that Your files are never shared nor will any third parties have access to your design files. We can accept sign an NDA(Non-disclosure agreement) before sending files.
Q.May I have a sample for testing ?
A:We can supply the sample if we have ready parts in stock,we also can accoring to custom demand to design the PCBA samples to test first before big order .
Q:Are you factory or Trading company?
A: We are a factory with PCB maufacture and SMT assembly factory in China .
Q:Do you have an minimum order quantity?
A:We accept sample order with as low as a quantity of 1 (piece or panel) before bigger order.
Q. How about your delivery time?
A: Generally, goods would be shipped in 7-10 working days after payment received, finally depends on order quantities.
Q:what's the Payment way?
A:TT ,Western Union, Alibaba online payment
Q. Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery
Q: Can I customized for product?
A: Yes, we support OEM ODM
Q.What is your warranty ?
A : Within 60 days after package have been received .
Q.What is your terms of payment ?
A : Full Payment before send goods out.
Q: How to send the goods?
A: Small QTY: ship by express included in DHL, FedEx UPS and TNT. Door to door.
Large QTY: Ship by sea, or by air.
Q: How do you make our business long-term and good relationship?
A:1. We keep good quality and competitive price to ensure our customers benefit ;
2. We respect every customer as our friend and we sincerely do business and make friends with them,no matter where they come from.
Q. Do you accept process materials supplied by clients?
A: Yes, we can provide component source, and we also accept components from client.
