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April 2016

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Subject:
From:
Nagaraj U <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Nagaraj U <[log in to unmask]>
Date:
Tue, 26 Apr 2016 09:11:15 +0000
Content-Type:
text/plain
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text/plain (1 lines)
Hi Mr.David Bergman,

The test method that we're using for checking soldermask adhesion is 2.4.28.1F.
Sorry, that I had indicated it wrongly in my previous email.

One specific question that I have here is although the test method indicates
that 1/2" width tape has to be used, I don't understand on why the width is
restricted to 1/2".

Technically if I use 1" wide tape, I'll be testing double the
surface area, which is more stringent than using a 1/2" wide tape.

Will it not be correct if the test method indicates "....... a tape of minimum 1/2"
width...........".

Requesting your valuable inputs.

Thanks & Regards,
U.Nagaraj

________________________________________
From: TechNet [[log in to unmask]] on behalf of David Bergman [[log in to unmask]]
Sent: Thursday, April 21, 2016 18:52
To: [log in to unmask]
Subject: Re: [TN] Query on Tape used for Adhesion Test

Nagaraj, you are using a cancelled test method. I suggest 2.4.1 or 2.4.18.1 for adhesion testing. Both methods contain the following statement:

6.3 Certification of 3M Brand 600 1/2 inch tape to CID-A-A-
113 is not required. The 3M Brand 600 1/2 inch tape is available
through most office supply stores.


Best regards,
Dave

David W. Bergman
Vice President, Standards & Training
IPC - Association Connecting Electronics Industries
3000 Lakeside Drive Suite 105N Bannockburn, IL 60015-1249 USA
+1 847-597-2840 tel
+1 847-615-5640 fax
+1 847-867-1388 mobile
[log in to unmask]
Skype: davidbergmanipc
www.ipc.org



-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Craig Sullivan
Sent: Thursday, April 21, 2016 8:12 AM
To: Technet <[log in to unmask]>
Subject: Re: [TN] Query on Tape used for Adhesion Test

I believe the " CEDAA-1 13" is the A-A-113 document cited in the references.
I also believe it has been superseded by ASTM Standard Specification D6123.

Craig Sullivan
Manufacturing Engineer / IT Administrator
Phone: (607) 266-0480 x115
Fax: (607) 266-0482
Email: [log in to unmask]
Web: www.mplinc.com

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-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Nagaraj U
Sent: Thursday, April 21, 2016 6:44 AM
To: [log in to unmask]
Subject: [TN] Query on Tape used for Adhesion Test

Hi All,

We're using IPC-TM-650 test method 2.4.1.1, for conducting adhesion test of solder mask and legend printing.

Clause 4.1 of the above indicated test method specifies :
"A roll of pressure sensitive tape 3M Brand 600 13 mm wide, or a tape as described in CEDAA-1 13, Type 1 Class 3, except that the tape may be clear"

Due to non-availability of 13mm wide 3M tape at our location, we're using 25.4mm wide 3M tape for conducting this test.

This was raised as an NC during one of the external audits.

I'm unable to get any information on CEDAA-1 13 document, to check if we can use 25.4mm wide tape and if does permit, probably we can forward that document/information to the auditor for their review.

It'll be great help to me if anybody knows about CEDAA-1 13 and provide me a link on how to get this document.

Thanking in advance.

Best Regards,
U.Nagaraj
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