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February 2010

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Subject:
From:
Eric CHRISTISON <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Eric CHRISTISON <[log in to unmask]>
Date:
Tue, 23 Feb 2010 08:53:05 +0000
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Irena,

Can you be a bit more specific.

Does the flex also have to go through reflow? Lead free reflow? How many 
times?

How long does the flex have to survive 200 deg C for? A few minutes or 
indefinitely?

Regards,



On 23/02/2010 08:17, Irena Sumanteva wrote:
> What kind of flex base materials to be used? Flex Circuit 2 layer which should operate at 200 C.
>
> Hi
> Our customer is currently designing a device in which he intend to use flex pcb, 2 layer, 0.25mm board thickness.
> Now what is interesting is that the device must be operation up to 200 degree Celsius.
>
> What kind of flex base material, coverlayer oand flex solder mask can withstand up to this temperature?
> The present Pyralux coverlay does nto support the operational T of 200 C.
>
> If it exists, what is their coefficient of expansion of pcb material?
> Can you send a link or other data sheet.
>
> Thank you in advance.
>
> Best regards,
> Irena
>
>
>
>
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-- 
Eric Christison Msc
Mechanical Engineer
Consumer&  Micro group
Imaging Division

STMicroelectronics (R&D) Ltd
33 Pinkhill
Edinburgh EH12 7BF
United Kingdom

Tel:	+44 (0)131 336 6165
Fax:	+ 44 (0)131 336 6001




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