LISTSERV - TECHNET Archives - LISTSERV.IPC.ORG

TECHNET Archives

January 2002

TechNet@IPC.ORG

	LISTSERV Archives
	TECHNET Home
	TECHNET January 2002

	Log In
	Register

	Subscribe or Unsubscribe

	Search Archives

Options:	Use Monospaced Font Show Text Part by Default Show All Mail Headers
Message:	[<< First] [< Prev] [Next >] [Last >>]
Topic:	[<< First] [< Prev] [Next >] [Last >>]
Author:	[<< First] [< Prev] [Next >] [Last >>]

Subject:	Re: BGA/Vias
From:	Rick Howieson <[log in to unmask]>
Reply To:	TechNet E-Mail Forum.
Date:	Wed, 16 Jan 2002 12:40:58 -0700
Content-Type:	text/plain
Parts/Attachments:	text/plain (47 lines)

I probably didn't make myself clear. The problem is the board itself
collapses/sinks/"potato chips"...in the area being heated, i.e. BGA
location.
Rick

-----Original Message-----
From: Earl Moon [mailto:[log in to unmask]]
Sent: Wednesday, January 16, 2002 11:36 AM
To: [log in to unmask]
Subject: Re: [TN] BGA/Vias


Agree with that. Without board reaching equillibrium (spelling?) top to
bottom, no even solder joint formation (in the case of BGA's - ball
collapse) possible. Uneven "sinking" (collapse) bound to occur but usually
within nanoseconds of others - depending on thermal conditions.

MoonMan

----------------------------------------------------------------------------
-----
Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt delivery of Technet send e-mail to [log in to unmask]: SET
Technet NOMAIL
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search previous postings at: www.ipc.org > On-Line Resources & Databases >
E-mail Archives
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700
ext.5315
----------------------------------------------------------------------------
-----

---------------------------------------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
---------------------------------------------------------------------------------

ATOM RSS1 RSS2

LISTSERV.IPC.ORG