Electronics Forum | Tue Nov 15 09:31:27 EST 2005 | arclightzero
I have been reading a good deal about IMC (purple plague in particular) in gold wire/aluminum pad wire bonds. My company uses ultrasonic wedge bonding, and for the most part all of our bonding is gold/gold, however we have one particulr part that has
Electronics Forum | Tue Nov 15 21:06:04 EST 2005 | davef
Is your IMC purple? [The sure way to tell if you have the 'purple plague'.] Where does the failure occur? * At pad / wire bond * Up wire from the bond Tell us about the aluminum pad. * What is the plating specification? Is that what you actually r
Electronics Forum | Tue Nov 07 22:44:39 EST 2017 | wrander1
Hi I'm new to the world of wire bonding. I seem to have some sort of pad contamination Preventing gold wire from bonding to aluminum pats. There appears to be a dozen microns size particles. And a slight crackling of the surface at 500 X. I am send
Electronics Forum | Mon Aug 27 15:06:29 EDT 2001 | davef
This otta push Wolfgang over the top ... Recommended reading G.G. Harman, Wire Bonding in Microelectronics : Materials, Processes, Reliability, and Yield, 2nd edition, McGraw-Hill Electronic Packaging and Interconnection Series, 1997. G.G. Harman, R
Electronics Forum | Fri Aug 17 11:55:31 EDT 2001 | davef
5uin. Your nickel thickness is fine. Although if you wanted to trade costs, consider giving-up nickel to 150uin thickness, while increasing the gold thickness. Gold over electroless nickel creates brittle joints because of phosphorous in the nicke
Electronics Forum | Fri Sep 27 11:20:21 EDT 2002 | davef
Mar, The previous post makes the best point. Your finish spec depends on the COB process you plan to use. Is your process: * Gold wire bond * Aluminum wire bond * Flip chip * Er, watt
Electronics Forum | Sun Jan 22 09:44:17 EST 2006 | davef
Wire bonding is a die connect methodology that runs either gold or aluminum wires between pads on the integrated circuit to either a lead frame or pads on a printed circuit board. For more look here on Daan Terstegge's excellent link page http://www
Electronics Forum | Tue Sep 26 07:46:49 EDT 2023 | robertanderson
A transformer winding machine is a specialized piece of equipment used in the manufacturing of transformers. Transformers are electrical devices that transfer electrical energy between two or more circuits through electromagnetic induction. They cons
Electronics Forum | Tue Oct 07 12:35:10 EDT 2008 | andy_pal
Hi All, I am using COB on my DOUBLE SIDED PCB. lastly we used Eletrolytic Ni / Flash Gold Plating. Our Boards vias Failed the UL corrosion Test. we did some cross-section analysis and found 10.75 �m of Nickel and 0.022 um of Gold and as the Process
Electronics Forum | Tue Nov 05 06:51:59 EST 2002 | V.RAMANAND KINI
Hi, This is a widely discussed subject and since you have asked a brief explanation, I assume, you are a business man or a top executive in the company venturing in to COB. I waited to see if someone replies to you. May be it is a very old subject
