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June 1998

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Subject:
Re: Tape residue elimination
From:
"Coleman, Ron" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 15 Jun 1998 09:45:55 -0500
Content-Type:
text/plain
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text/plain (106 lines) 
We evaluated several hot air levelling tapes and have found two tapes that
have completely eliminated any quality issues associated with HAL tapes,
i.e., residue, lifting , delamination etc.. If you would like more info on
the tapes we identified please contact me directly via email.
-----Original Message-----
From: Bill Davis <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Date: Monday, June 15, 1998 9:15 AM
Subject: Re: [TN] Tape residue elimination


>Have you tried polyimide tapes?
>
>> -----Original Message-----
>> From: Paul Gould [SMTP:[log in to unmask]]
>> Sent: Sunday, June 14, 1998 8:46 AM
>> To:   [log in to unmask]
>> Subject:      Re: [TN] Tape residue elimination
>>
>> Hello Duane,
>>
>> you could try a good quality paper masking tape. As long as it is peeled
off
>> while the panel is still warm after soldering, it should not leave a
>> residue.
>>
>> Otherwise, there are some very good (and expensive) masking tapes used in
>> hot air solder levelling, and believe me that needs a good tape. We use
one
>> which leaves no residue and withstands the extremes of hot air levelling
>> without lifting. Expensive though the tape is, it is cheaper than
peelable
>> mask although that product also works well. Your pcb supplier should be
able
>> to supply your pcb's with peelable mask.
>>
>> I can't remember the details of the tape but if you email me at my
office,
>> [log in to unmask], I will get the details for you. You can also get
tape
>> dispensers which deliver a measured length of tape pre-cut which speeds
up
>> the application. Manual machines are cheap but you can get motorised ones
>> for volume use.
>>
>> Regards
>> Paul Gould
>> Teknacron Circuits Ltd
>> Isle of Wight, UK
>>
>> >From: Duane Briggs
>> >To: [log in to unmask]
>> >Subject: [TN] Tape residue elimination
>> >Date: Monday, June 01, 1998 8:29PM
>> >
>> >Gold fingers have to be covered during flow soldering.  Is there any
>> >tape
>> >that does NOT leave ANY residue?  If not, what is the best, cheapest way
>> >of
>> >removing the residue?  Pallets are not an option for us unfortunately.
>> >
>> >Duane
>>
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