Hmmmmmmmmmmmmmmmm,
I wonder how that dry film stands up to 260 centigrade on lead
free...............!!!.....happy Friday..........8-)
John
------------------------------------
Avanex
John Burke
Senior Manager RoHS Compliance
[log in to unmask]
40919 Encyclopedia Circle
Fremont
CA 94538
tel: 510 897 4250
fax: 510 979 0189
mobile: 510 676 6312
------------------------------------
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Stephen Gregory
Sent: Friday, June 03, 2005 9:15 AM
To: [log in to unmask]
Subject: Re: [TN] Dry Film "Soda Strawing"...an update.
John,
You're right. I'm the perfect example...how many times have I posted
to the TechNet about solder mask problems? How many times have
those posts had to do with dry film solder masks? I rest my case.
I wish there was someway I could get our customers who use dry film
mask switch to LPI, but I can't. When I ask why they won't consider
switching, the standard answer usually is; "Because that's what we've
always used..."
It's hard to argue with that...
Kind regards,
-Steve Gregory-
Senior Process Engineer
LaBarge Incorporated
Tulsa, Oklahoma
(918) 459-2285
(918) 459-2350 FAX
|---------+---------------------------->
| | John Parsons |
| | <jparsons@ENIGMAC|
| | ORP.COM> |
| | Sent by: TechNet |
| | <[log in to unmask]>|
| | |
| | |
| | 06/03/2005 10:56 |
| | AM |
| | Please respond to|
| | TechNet E-Mail |
| | Forum; Please |
| | respond to John |
| | Parsons |
| | |
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| To: [log in to unmask]
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| cc:
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| Subject: Re: [TN] Dry Film "Soda Strawing"...an update.
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For more years than I care to remember I have always been under the
impression that dry film mask caused more problems with SMT assembly than
it
solved because of issues of coplanarity or lack thereof. I know that it
can
provide better tenting abilities but is the rest of my thinking somewhat
outdated?
John
-----Original Message-----
From: Dehoyos, Ramon [mailto:[log in to unmask]]
Sent: Friday, June 03, 2005 5:27 AM
To: TechNet E-Mail Forum; John Parsons
Subject: RE: [TN] Dry Film "Soda Strawing"...an update.
Dry film is capable of providing greater thickness than LPI. It
keeps solder paste from shorting across to other pads. One of probably few
advantages.
Ramon
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of John Parsons
Sent: Thursday, June 02, 2005 7:01 PM
To: [log in to unmask]
Subject: Re: [TN] Dry Film "Soda Strawing"...an update.
Not to hijack Steve's thread but what would be the reasoning for applying
the dryfilm mask over LPI? What would be the benefits here? Within our
customer base we never get calls for dryfilm mask so I am not clear on it's
preferred application. Steve's customers sure seem to like it! It does
seem somewhat problematic for him though :o) .
John Parsons
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bob Metcalf
Sent: Thursday, June 02, 2005 3:49 PM
To: [log in to unmask]
Subject: Re: [TN] Dry Film "Soda Strawing"...an update.
Steve,
While it is not an "easy" process, I know a number of companies that have
done the dry over liquid process for several years. Your fab shop needs to
verify the LPI is compatible with the dry film and there are a few tricks
to
make it easier. If you contact one of the solder mask services (Solder Mask
Inc, Mask Tek etc) they can do the job for your vendor or perhaps give them
some tips to help them do it themselves.
Regards,
Bob
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