Hi Lon,
You should not have an issue as long as you use a polyimide base and a
polyimide covercoat - not a flexible soldermask. The part can take one
crease but if you open it and close the flex , it will probably fail. You
obviously cannot bend through the nickel/gold. If you want to be extra sure
build it as an adhesiveless with a thinner kapton covercoat. Good Luck.
Steve Kelly


PFC Flexible Circuits Limited
Ph: (416) 750-8433
Fax: (416) 750-0016
Cell: (416) 577-8433
E-Mail: [log in to unmask]

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Lon Weffers
Sent: Thursday, May 12, 2005 7:13 AM
To: [log in to unmask]
Subject: [TN] Bending flex 90 deg

Dear Technetters,

What type of flex can I best use to bend 90 degrees?
Our custormer wants to glue the flex inside a metal box. The radius in the
corners should be as small as possible. (nearly zero)
Copper thickness about 30micron, goldfinish.The flex is designed with a lot
of parallel tracks, single sided.

Thanks in advance

Lon Weffers
Matas Electronics
The Netherlands

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