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August 2009

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Subject:
From:
Steven Creswick <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Steven Creswick <[log in to unmask]>
Date:
Wed, 5 Aug 2009 10:11:14 -0400
Content-Type:
text/plain
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text/plain (275 lines)
Joyce,

The 'law of bean-counters' is the same all over too.  I would like to see
them work around the problem and come up with a viable & reliable solution!
They also don't always understand the old adage - "garbage in-garbage out",
thinking that cheapest is always best.

I guess in some ways that applies to employment as well.  Seems like many
firms nowadays opt for the cheap, inexperienced individuals and disregard
the experienced ones [excluding Steve Gregory].  

I find that one usually gets what you pay for...  Experience doesn't always
come from a book, or a forum [although it can certainly help!].  Some of the
greatest, most valuable learning experiences are those hardest learned.  I'm
sure we can each relate to that.

It seems silly not to pass knowledge along [unless it is proprietary, etc].
Why waste energy/time/$ when we could bump ourselves up to the next level of
creativity/productivity/technology...

Steve C

-----Original Message-----
From: Joyce Koo [mailto:[log in to unmask]] 
Sent: Wednesday, August 05, 2009 9:53 AM
To: [log in to unmask]; [log in to unmask]
Subject: Re: [TN] Wire bond

Good to know the law of physics didn't change across the boarder.  Thx to
confirm the method.  Bean counter didn't like it, take few micro second
longer per bond.  Impact on throughput.  Of course, the bean counter never
bond a single wire in his life. 
--------------------------
Sent using BlackBerry


----- Original Message -----
From: TechNet <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Sent: Wed Aug 05 08:12:29 2009
Subject: Re: [TN] Wire bond

Joyce,

Exactly!!  You've learned the hard way too!  Took me a while to figure it
out, but it is something I've never forgotten!

Very similar to bonding a MEMs device, attached with RTV.  Wild!!!

Steve

-----Original Message-----
From: Joyce Koo [mailto:[log in to unmask]] 
Sent: Tuesday, August 04, 2009 9:40 PM
To: [log in to unmask]; [log in to unmask]
Subject: Re: [TN] Wire bond

Yap.  Sit, wait, fire US with high power.  Not something nice to have.  Too
much dumping. 
--------------------------
Sent using BlackBerry


----- Original Message -----
From: TechNet <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Sent: Tue Aug 04 19:05:16 2009
Subject: Re: [TN] Wire bond

Joyce,

Even an acrylic PSA can get a little squishy at thermosonic temps.  

Have you had to deal with stiffeners attached with silicone in the past?

Steve

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Joyce Koo
Sent: Tuesday, August 04, 2009 2:48 PM
To: [log in to unmask]
Subject: Re: [TN] Wire bond

Attached with silicone?

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Kelly
Sent: Tuesday, August 04, 2009 1:55 PM
To: [log in to unmask]
Subject: Re: [TN] Wire bond

Hi Inge 
- flex? -  18 micron copper on adhesiveless kapton - stiffener
underneath.
Regards Steve

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge
Sent: August-04-09 1:52 PM
To: [log in to unmask]
Subject: Re: [TN] Wire bond

Ceramic : No
FR-4 : No
LTCC: No
Glass: No
Steel:  No
Teflon: Yes

/Inge


----- Original Message ----- 
From: "Steve Kelly" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, August 04, 2009 5:36 PM
Subject: [TN] Wire bond


Good Morning,

Does the size of a wire bond pad (in this case with a perfect etch .002 
wide) have any effect on whether the wire bonder does Al wedge or 
Thermosonic gold( I know the gold plating is different) - just asking
about 
the process. Thanks. Steve Kelly



Steve Kelly (PLEASE NOTE NEW E-MAIL ADDRESS)

(416) 750-8433 (work)

(416) 750-0016 (fax)

(416) 577-8433 (cell)




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