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June 2004

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Subject:
From:
Lakshmi Dwivedula <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 9 Jun 2004 18:51:39 -0400
Content-Type:
text/plain
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text/plain (189 lines)
Press fit connectors take more force to press into Immersion Silver when
compared to SnPb. If I take an average value, not worrying about the exact
finished hole size, if I obtained 8lb./pin on SnPb, I might get 13-14lb./pin
on immersion silver on the 2mm family - Z Pack. Also, you probably do not
want to use a pneumatic press to press these in, if the hole size is on the
lower end. You could end up with rolled connectors. Manual Arbor might prove
to be a challenge, if a full connector - 25 column, 7 row and above needs to
be pressed in....
Going to the highest specified drill size possible and specifying a nominal
size of one mil higher and 2 mil tolerance also helps.
Typically an electric press overcomes the issues of the other two kinds.
Also, you can program the speed to suit the geometry and style of the pin.

Regards,
Lakshmi


-----Original Message-----
From: Gebhard.Neifer [mailto:[log in to unmask]]
Sent: Wednesday, June 09, 2004 10:33 AM
To: [log in to unmask]
Subject: [TN] AW: [TN] Immersion Silver finish and press-fit connectors


http://www.tycoelectronics.com/environment/leadfree/pdf/leadfree_press-in_cu
stomer_report.pdf




Gebhard

_______________________________

Delphi Deutschland GmbH

Body & Security Electronics

Manufacturing Engineering Design

Albert Einstein Straße 5




D-51674 Wiehl-Bomig







Tel.:         +49 (0)2261-971-880

Fax:         +49 (0)2261-972-880

Mobile:     +49 (0)151-18223504

E-mail: [log in to unmask]         





-----Ursprüngliche Nachricht-----
Von: TechNet [mailto:[log in to unmask]] Im Auftrag von Craig Cullum
Gesendet: Mittwoch, 9. Juni 2004 15:27
An: [log in to unmask]
Betreff: [TN] Immersion Silver finish and press-fit connectors




Hello all,




We are considering switching from HASL to Immersion Silver finsih on our

PCBs.




How would this impact the 2mm press-fit connectors?




Anyone willing to share their experiences?




Thank you in advance.




Regards,

Craig




Craig Cullum, Engineering Technologist, AMTELCO

e: [log in to unmask]

   [log in to unmask]

f: 608 838 8367

v: 608 838 4194, or 4197, x128




Visit AMTELCO at www.amtelco.com




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