Caring Circuit Tech Limited
Skype. caringcircuit
Tel. +86 755 2311 0701
Fax. +86 755 2311 0701
An unbelievably simple approach to order from us. Just two steps from you
Step #1: You- Send Gerbers with quantity, specifications, destination, etc. View details Step #2: We- Detailed quote in 2 hours (max.10 hours, price, lead time, freight, standards, etc.) Step #3: You- Confirm your order and pay. View payment term All in advance (preferred, it will save bank charges)
30% deposit and balance before delivery against pcb reports and photos of bare pcb, packages and packing list (OK). View reports and photos format Step #4: We- PCB layout check and fabrication. View engineering query format Step #5: We- Reports of fabrication status. View fabrication reports format Step #6: We- Deliver and send you delivery note. View delivery note format
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There are many factors to consider when selecting a final PCB surface. Below is a consolidated list of popular finishes and their general characteristics.
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HASL(SnPb) | HASL lead-Free | Electroless Nicked Immersion Gold-ENIG | Organk Solderable Coating-OSP | Immersion Silver | Immersion Tin-Isn | Electrolytic Nicked Gold-NiAu |
Fabrication rate | 20% | 25% | 30% | 10% | 5% | 5% | 5% |
Fabrication cost | low | low | Medium | low | Medium | Medium | High* |
RoHS Compliant | No | Yes | Yes | Yes | Yes | Yes | Yes |
Shelf life | 1 year | 1 year | 1 year | 9-12 months | 9-12** months | 9-12 months | 1 year |
Assembly Cycle Capacity | Multiple | Multiple | Multiple | Multiple | Multiple | Multiple | Multiple |
Solder Wettability | Excellent | Good | Good | Good | Very Good | Good | Good |
Solder Joint Integrity | Excellent | Good | Good | Good | Excellent | Good | poor** |
Co-planarity | Poor | Good | Excellent | Excellent | Excellent | Excellent | Good/Poor |
Low Resistance/High Speed | No | No | No | N/A | Yes | No | No |
Multiple Rework Capacity | Limited | Limited | Limited | No | Yes | No | No |
Aluminum Wire Bond | No | No | No | Yes | No | No | Yes |
* Cost deponds on Au thickness | |||||||
** Requires unique storage techniques | |||||||
***Thicker Applications of Au can cause embrittlement. |
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