Electronics Forum: bond and wedge and enig (Page 1 of 1)

COB and wire bond

Electronics Forum | Mon May 07 11:02:17 EDT 2001 | Singh

Hi all. I am looking into the implementation of the Chip on Board process with eutactic bonding and the then using either gold or aluminum wire to make wedge type wire bonding. Since I am totally new to this, can somebody guide me thru the process,

COB and wire bond

Electronics Forum | Tue Jun 04 19:33:16 EDT 2002 | rob_thomas

Dave's estimation is pretty conservative but there is a lot of equipment out there and a lot of people happy to make a sale.Implementing both mentioned processes it's difficult and time consuming .Even if you get good training from whoever sells you

soldering and bonding on gold PCB's

Electronics Forum | Mon Jan 07 20:37:15 EST 2002 | davef

For soldered areas, we like to keep gold thickness substantially below the maximum you propose. Search the fine SMTnet Archives for our discussions on the topic of acceptable levels of gold with solder connections. Let�s fix this �no one seems be s

force between the pad and laminate material

Electronics Forum | Mon Jun 17 13:45:29 EDT 2002 | genny

When the pad comes off, is it leaving behind a "black" area? Your board may be suffering from black pad - a condition that occasionally affects ENIG finish boards. It is a process control issue with your board fabricator. The nickel is oxidising b

soldering and bonding on gold PCB's

Electronics Forum | Wed Jan 09 15:24:49 EST 2002 | mregalia

Thanks Chris. As I was writing my last message our mailperson dropped off the latest issue of Circuit Assembly. It has an article on mixing SMT and COB on the same board. The author recommends as a compromise 10-20 micro inches of gold over 70-100 of


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