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Date: | Thu, 21 Jul 2005 12:50:12 -0400 |
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This is basically design specific. .003" web is currently a standard
minimum feature size and these works well to gasket and keep solder from
flowing. A .002" web we have run several time and the issues with
shorts increased a good %. The solder tends to bridge more readily over
a .002" dam, but we did not perform further analysis on the assembly
process conditions.
Jeffrey Bush
Director, Quality Assurance and Technical Support
VERMONT CIRCUITS INCORPORATED
76 Technology Drive - POB 1890
Brattleboro, Vermont 05302
Voice: 802.257.4571.21 Fax: 802.257.0011
http://www.vtcircuits.com
-----Original Message-----
From: Cheryl Johnson [mailto:[log in to unmask]]
Sent: Thursday, July 21, 2005 12:02 PM
To: [log in to unmask]
Subject: [TN] Soldermask inspection
Do you know if any spec exists defining minimum soldermask webs
(particularly between vias and bga pads)?
Any inspection criteria?
Your help is appreciated.
Sincerely,
-----------------------------------
Cheryl Johnson, C.I.D.+
Manager
ExcelStor US Office, Engineering Services
Email: [log in to unmask]
Tel: (303) 684-7291
Fax: (303) 684-7268
Mobile: (303) 809-5815
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