Hi Mumtaz,
My reaction is that there seems to be no hole stiffeners.
And the barrels are not uniform.
Inge

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Från: TechNet [mailto:[log in to unmask]] För Mumtaz Bora
Skickat: den 29 november 2005 05:02
Till: [log in to unmask]
Ämne: [TN] Via Cracking in flex cable

Dear All,

We have an issue with flex cables cracking in cellphone
assembly.  X-sections are showing voids, some residue and cracking in
the
via. It appears to be a combination of smear remove and copper plating
problem. Any insight from the flex circuit and plating experts will be
appreciated.  I have asked Stephen Gregory to post the X-sections on his
website.
Thank-you

Mumtaz

  D/ 252 - SMT Process and Component Quality
  Bldg. V238E
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Fax    (858)-882-3126
Page  (858)-635-1180
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email: [log in to unmask]
Kyocera-Wireless Corp.
10300, Campus Point Drive
San Diego, Ca  92121,USA

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