Nickel Five
Posted in Uncategorized on 08/22/2009 07:01 am by admin
Nickel Five
![]() |
![]() 1963 P Jefferson Nickel from US Mint Proof Set 5c Five Cent Coin Made in USA US $3.95
|
Surface finishes for PCBs fluctuate in reliability, shelf life, flatness, price, and assembly procedures. All finishes have their own benefits; however, the process, product, and / or final use determine which surface finish works best for use with a specific application. The designer, end-user or assembler needs to work with the PCB manufacturer to choose the correct finish for the product design.
Hot Air Solder Leveling (HASL)
Hot Air Solder Leveling, a 63/37 tin lead solder, has served as the industry standard since the start of the circuit board.. HASL is the favorite because "Nothing Solders like Solder." In situations where you have no concern about lead, HASL proves cost effective as well as a reliable finish for the making of PCBs of standard technology. This finish does, however, further stress on high layer circuit boards, resulting in ineffective long-term use. The added stress, short shelf life, and uneven soldering height on thick SMT or BGA pads make HASL a bad choice for wire bonding or chip technology. New technologies, tighter design principles and environmental issues are starting to make HASL obsolete. There are many Lead-free alloys that can replace the 63/37 tin lead solder process to make the board ROHS or Lead Free.
Lead-Free Hot Air Solver Level (LF HASL) is the ROHS compliant version of HASL. It is applied in the same but it is a different composition of the Solder. To comply with Lead-Free, the lead is removed and replaced by Gold, Nickel or other metals depending on your PCB manufacturer - thus the thickness varies anywhere between 1 to 15 mm.
Immersion Silver
Immersion Silver is a very simple process. The silver replaces the copper during the immersion process. It is quickly gaining recognition as a lead-free surface finish because of its lower cost (Compared to ENIG), uniform thickness and the capability to withstand the lead-free assembly temperatures. Immersion silver has a shelf life of one year. Over the past year PBC facilities installed silver process lines more than any other type of finish. Immersion silver has a controlled thickness of five to twelve micro inches and remains cost efficient, compatible with the majority of assembly processes.
Electroless Nickel/Immersion Gold (ENIG)
In the past users recognized ENIG as the best flat (fine pitch) surface and lead-free choice in the world. This surface finish holds several advantages, including exceptional shelf life and long-term experience and/or knowledge of the product. Nickel thickness generally measures 75 micro inches, compared to three to five micros for gold. The surface finish also possesses some disadvantages, including a higher cost, two-part. In addition, in situations of an uncontrolled process you may see the quality issue known as "Black Pad." Here at Sierra Circuits, after years of working with ENIG, we have eradicated the "Black Pad" problem. By carefully varying gold thickness, we have been able to figure out the ideal thickness for the gold to make sure that our customers never see Black Pads.
Immersion Tin
Tin immersion process, more popular in the past, offers a consistent flat surface about 20-40 micro inches thick. It solders well and remains cost efficient. However, the finished PCBs have a limited shelf life necessitating you use them within three to six months. PCB factories worldwide have this process in place. It is also perfect for Lead Free assembly.
Organic Solderability Preservatives (OSP)
Organic Solderability Preservatives began in the 1970s and provide a thickness so fine you almost can't measure it. The first formulas offered a limited shelf life of three to six months and withstood only one or two heat cycles, but today the newest OSP formulas offer much more because of their construction for lead free assembly and provide shelf life 12 months as well as the ability to handle numerous heat cycles.
Electroless Nickel - Electroless Palladium - Immersion Gold (ENEPIG)
ENEPIG Is considered by many people call it - the "Universal" finish. Is a combination of three metals- nickel, palladium and gold. It is considered the best surface finish for Lead-Free assembly and wire bonding. Because of the combination of the three metals, it has the best galvanic resistance. The palladium separates the gold from the Nickel to prevent noise voltage and stop corrosion. Also, because of the falling price of Palladium, it has become very reasonably priced. Sierra Circuits is one of the leading PCB manufacturers to offer ENEPIG.
Amit Bahl
Director of Marketing and Sales for Sierra Circuits, Inc.
Amit is tasked with exploring and developing new markets for High Density Interconnect PCBs and Microelectronic substrates. Sierra Circuits, Inc. has primarily serviced the quick turn prototype market and is now actively developing the Medical, Military and Automotive markets. Prior to joining Sierra Circuits, Inc., Amit Bahl was a part of IBM's Global Services team, where he worked on automating and optimizing business processes using the latest Information technologies. Amit Bahl received his B.S.C in computer science with a minor in marketing from UCLA.
https://www.protoexpress.com/index.jsp
http://www.multicircuits.com/pcb/tech/surface_finishes.html word count 740
|
|
Matte Nickel Five-Light-Chandelier $128 Matte Nickel Five Light-Chandelier |
|
|
Five-Light Brushed Nickel Chandelier $256 Five-light chandelier in brushed nickel with alabaster style glass uplights. |
|
|
Elysburg Five-Light Satin Nickel Chandelier $373 Elysburg Five-Light Satin Nickel Chandelier |
|
|
Midtown Matte Nickel Five-Light Chandelier $663 Midtown Matte Nickel Five-Light Chandelier |
|
|
Rockville Polished Nickel Five-Light Chandelier $1393 Rockville Polished Nickel Five-Light Chandelier |
|
|
Williamsburg Five-Light Brushed Nickel Chandelier $152 Williamsburg Five-Light Brushed Nickel Chandelier |
|
|
Nico Brushed Nickel Five-Light Bath Fixture $374 Nico Brushed Nickel Five-Light Bath Fixture |
|
|
Meridian Brushed Nickel Five-Light Chandelier $631 Meridian Brushed Nickel Five-Light Chandelier |
|
|
Easton Polished Antique Nickel Five-Light Chandelier $538 Easton Polished Antique Nickel Five-Light Chandelier |
|
|
Dichroix Satin Nickel Five-Light Chandelier $1861 Dichroix Satin Nickel Five-Light Chandelier |
|
|
Trivoli Polished Nickel Five-Light Chandelier $1276 Trivoli Polished Nickel Five-Light Chandelier |
|
|
Claremont Polished Nickel Five-Light Chandelier $389 Claremont Polished Nickel Five-Light Chandelier |
|
|
Hathaway Antique Nickel Five-Light Bowl Pendant $584 Hathaway Antique Nickel Five-Light Bowl Pendant |
|
|
Midtown Brushed Nickel Five-Light Chandelier $374 Midtown Brushed Nickel Five-Light Chandelier |
|
|
Alexandra Polished Nickel Five-Light Chandelier $1052 Alexandra Polished Nickel Five-Light Chandelier |
|
|
Rivoli Polished Nickel Five-Light Bath Bar $1276 Rivoli Polished Nickel Five-Light Bath Bar |
|
|
Candle Satin Nickel Five-Light Mini Pendant $1065 Candle Satin Nickel Five-Light Pendant |
|
|
Cloudburst Polished Nickel Five-Light Chandelier $804 Cloudburst Polished Nickel Five-Light Chandelier |
|
|
Yorkshire Satin Nickel Five-Light Bath Fixture $381 Yorkshire Satin Nickel Five-Light Bath Fixture |
|
|
Duchess Antique Nickel Five-Light Chandelier $328 Duchess Antique Nickel Five-Light Chandelier |
|
|
Middlebury Historic Nickel Five-Light Pendant $1861 Middlebury Historic Nickel Five-Light Pendant |
|
|
Monaco Brushed Nickel Five-Light Chandelier $877 Monaco Brushed Nickel Five-Light Chandelier |
|
|
Duet Brushed Nickel Five-Light Bath Fixture $374 Duet Brushed Nickel Five-Light Bath Fixture |
|
|
Loft Matte Nickel Five-Light Chandelier $291 Loft Matte Nickel Five-Light Chandelier |
|
|
Tanga 1 Matte Nickel Five-Light Pendant $384 Tanga 1 Matte Nickel Five-Light Pendant |
|
|
Hemisphere Five-Light Satin Nickel Bath Fixture $216 Hemisphere Five-Light Satin Nickel Bath Fixture |
|
|
Cortland Satin Nickel Five-Light Chandelier $561 Cortland Satin Nickel Five-Light Chandelier |
|
|
Opus Brushed Nickel Five-Light Chandelier Base $607 Opus Brushed Nickel Five-Light Chandelier |
|
|
Talo Satin Nickel Five-Light Bath Fixture $213 Talo Satin Nickel Five-Light Bath Fixture |
|
|
Ashton Five-Light Satin Nickel Chandelier $349 Ashton Five-Light Satin Nickel Chandelier |
|
|
Zanzabar Five-Light Chandelier In Satin Nickel $466 Zanzibar Five-Light Chandelier In Satin Nickel |
|
|
Midtown Polished Nickel Five-Light Chandelier $663 Midtown Polished Nickel Five-Light Chandelier |
|
|
Channing Five-Light Satin Nickel Chandelier $494 Channing Five-Light Satin Nickel Chandelier |
|
|
Calais Five-Light Chandelier In Satin Nickel $466 Calais Five-Light Chandelier In Satin Nickel |
|
|
Yorkshire Satin Nickel Five-Light Pendant $423 Yorkshire Satin Nickel Five-Light Pendant |
|
|
Carlisle Brushed Nickel Five-Light Chandelier $492 Carlisle Brushed Nickel Five-Light Chandelier |
|
|
Alessa Matte Nickel Five-Light Mini Pendant $672 Alessa Matte Nickel Five-Light Mini Pendant |


US $.99































































































