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November 1997

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Wed, 19 Nov 1997 22:09:25 -0500
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Hi Steve,
Both NAS Electronics [718-961-6757] and North Penn Technology [215-997-3200]
have a wide variety of add-on leads. Be careful, however; from your query I
assume that you are talking about ceramic LCCs on FR-4 PCBs and therefore a
large global thermal expansion mismatch. If this is the case, make sure the
lead design gives a low enough lead stiffness to meet your reliability
requirements. While neither NAS nor North Penn supply the lead stiffness
value on their data sheets (at least the last time I looked), I do know that
they have them and supply them on request. Also make sure that you are
comfortable with the lead material and any overplates on them.

Werner Engelmaier
Engelmaier Associates, L.C.
Electronic Packaging, Interconnection and Reliability Consulting
23 Gunther Street                                 In December:                                               7 Jasmine
Run
Mendham, NJ  07945                                                                  Ormond Beach, FL  32174  USA
Phone & Fax: 973-543-2747                         Phone: 904-437-8747, Fax: 904-437-8737
E-mail: [log in to unmask]

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