Wire bonding gold on pcb

I saw an ad for some tiny solder-down wire-bondable metal chunk things, in some microwave magazine. You could pick-and-place them like ordinary parts.

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John Larkin         Highland Technology, Inc 
picosecond timing   precision measurement  

jlarkin att highlandtechnology dott com 
http://www.highlandtechnology.com

Hmm that sounds promising. I'll try google. (Any ideas about what to search for??)

George H.

(I've sent quote requests out to Sierra circuits and some place called pcb universe. Trolling for others....)

I vaguely remember "moly tabs" (molybdenum), I think... been at least

30 years since I last had any personal responsibility with wire bonding. ...Jim Thompson

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| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| San Tan Valley, AZ 85142     Skype: skypeanalog  |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
I love to cook with wine.     Sometimes I even put it in the food.

Hmm well I found this "moly tab" down on the last page.

But it's a heat spreader. Still thanks for waking up those old brain cells.

George H.

Submounts?

--

John Larkin         Highland Technology, Inc 
picosecond timing   precision measurement  

jlarkin att highlandtechnology dott com 
http://www.highlandtechnology.com

Or go to IMS or Caddock and buy a 1 meg resistor with wraparound bondable end caps. That gets you two surface-mount bond pads cheap.

--

John Larkin         Highland Technology, Inc 
picosecond timing   precision measurement  

jlarkin att highlandtechnology dott com 
http://www.highlandtechnology.com

--

John Larkin         Highland Technology, Inc 
picosecond timing   precision measurement  

jlarkin att highlandtechnology dott com 
http://www.highlandtechnology.com

Grin.. I was just going to upload this,

I'll give them a call tomorrow and find out a price. (Thanks for the tip.)

George H.

Den onsdag den 12. november 2014 20.24.35 UTC+1 skrev George Herold:

What gadget are you making that justifies the hassle of wire bonding but not a $2K prototype?

-Lasse

Hmm, I guess I may be living in a penny wise, but pound foolish job. metal - semi-conductors contacts. I'm looking for any wisdom.

$20contacts/sci.electronics.design/HAy56ANa17E/yz2n5_E_hT4J That's a long link. better?

Anyway the wafers are ~6x$100, I've got several metal masks for ~$300. The machines at the CNF are ~$1-200/hr. (maybe $300, I've got to pay for my gold.) After a prototype run, I'll want to make 'em as cheap as possible.

JL's, gold standoffs look pretty much perfect.

George H.

Hi,

I am a fellow CNF user, and I'm also looking for a way to do gold wirebonding to a PCB.

Did you even find a vendor that would do wirebondable gold for a reasonable price? Or find a different way to do gold wirebonds?

There must be a way!

Yes, just fly.

The best way is to ask the wire bonding house to get the PCB. Just give them gerber files and bonding diagram and they know what to do.

I can do it for 2K. Let see: $600-$700 round trip air. $1000 for 10 days hotels while waiting. Yes, $300 for food.

Hi Ms2. We now have a place making these for us. So I'm out of the wire bonding business. But I bought these gold standoffs... gold plated onto Alumina.. four sides. Soldered those onto the PCB and then wire bonded to those... worked fine (well someone had to help me setup the wire bonding machine... ) I had more problems getting the gold to stick to my semiconductor samples.

Oh standoffs bought from this place

I think about $1 each in quantities of 100.

George H.

Stupid question: what is wrong with using aluminum wires like in transistors and encapsulated ICs?

Gold can be much thinner and better conductor.

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2. > > >>> The machines at the CNF are ~-200/hr.

Thanks all for the great info. In my case, every wire is made of noble meta ls to prevent corrosion: the PCB will be ENEPIG, the MEMS chip has Platinum bond pads, and now the wirebonds will be made of gold. My device will be p otted and submerged in water for months.

Unfortunately Aluminum wires do corrode!

On Thursday, February 16, 2017 at 5:45:09 AM UTC-5, snipped-for-privacy@gmail.com wr ote:

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tals to prevent corrosion: the PCB will be ENEPIG, the MEMS chip has Platin um bond pads, and now the wirebonds will be made of gold. My device will be potted and submerged in water for months.

In case someone is still interested:

Sierra Circuits does ENEPIG in-house and you can get some ENEPIG boards sta rting at ~$350.

I will probably order with them.