TECHNET Archives

October 2000

TechNet@IPC.ORG

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 >>]

Print Reply
Subject:
From:
Arturo Urias <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Tue, 10 Oct 2000 12:30:36 -0500
Content-Type:
text/plain
Parts/Attachments:
text/plain (91 lines)
James, I have the same problem. Any ideas where I can buy the spacers?

Arturo Urias




"Marsico, James" <[log in to unmask]> on 10/10/2000 08:08:43 AM

Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond to
      "Marsico, James" <[log in to unmask]>

To:   [log in to unmask]
cc:    (bcc: Arturo Urias/AUS/NIC)

Subject:  Re: [TN] Heavy BGA's, now it's fine-pitch !



How about using a temporary spacer under each corner?

Jim M.


        -----Original Message-----
        From:   d. terstegge [SMTP:[log in to unmask]]
        Sent:   Tuesday, October 10, 2000 9:59 AM
        To:     [log in to unmask]
        Subject:        [TN] Heavy BGA's, now it's fine-pitch !

        Hi Technet,

        I need your advice on this one:
        Some time ago there was a discussion about soldering problems with
partnumberTMS320C6201GJC200 of Texas Instruments. It's a 1.27 mm pich BGA
with a heavy heat-slug on top. The weight of the heat-slug makes the
solderballs collapse a little too much, resulting in solder bridges.
        Now I've got to assemble some boards with similar parts, but with a
much smaller ballpitch of only 0.8 mm.
        No problem for the ordinary type BGA's, but with the heatsink I'm
starting to feel uncomfortable. For the record: it's TI's part
numberTMX320C6203GLS.
        I've got to build two boards, and all I've got is two components. No
trial and error possible......
        If anyone of you have experience or thoughts about this, please let
me know.

        Kind regards,

        Daan Terstegge
        SMT Centre
        Signaal Communications
        Unclassified mail
        Personal Website: http://www.smtinfo.net




----------------------------------------------------------------------------
-----
        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
        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
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
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