Hi Jack,
Just in the picture...
-Steve Gregory-
----- Original Message -----
From: "Jack Olson" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, January 08, 2007 4:27 PM
Subject: Re: [DC] Rigid flex "snap off"
> Hey Steve,
>
> I noticed the comps in your picture have no ID.
> Do you remove them in the PICTURE, or do you
> do modify them for REAL?
>
> just curious,
> Jack
> .
>
>
>
> On 1/8/07, Steve Gregory <[log in to unmask]> wrote:
>>
>> Hi Scott!
>>
>> We build a board that's a rigid-flex and has two small boards aside from
>> the main assembly that we separate. Take a look at:
>>
>> http://stevezeva.homestead.com/files/Rigid_Flex.jpg
>>
>> The two small boards along the bottom edge are removed along with the
>> main assembly after everything is built. We don't snap them out though,
>> we actually use a "nibbler" from Fancourt. Basically a hook shaped blade
>> that comes down and shears the tabs that holds everything in the panel.
>> This panel also has perforated tabs and I think that's a good thing.
>> Polyimide is very brittle as you probably know, and the drilled
>> perforations keep most all of the cracks that occur during singulation
>> from penetrating inwards towards the PCB.
>>
>> -Steve Gregory-
>>
>> -----Original Message-----
>> From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of
>> Scott Riley
>> Sent: Monday, January 08, 2007 10:31 AM
>> To: [log in to unmask]
>> Subject: [DC] Rigid flex "snap off"
>>
>> I've got a 6 layer rigid flex design with the rigid portions being on
>> each end and two flex layers joining them (picture a barbell). The
>> customer wants an additional board attached to one of the rigid portions
>> that will be "snapped off" at a later time. There is no circuitry
>> running between these two pieces.
>>
>>
>>
>> I'm not sure how well the polyimide that is sandwiched between the FR4
>> is going to "snap off". I told the customer that it is made to flex and
>> will most likely remain connected. I'm thinking about making perforated
>> breakaway tabs, but think the flex material may still need to be cut
>> somehow. The boards would be assembled prior to separation.
>>
>>
>>
>> Does anyone have any experience with something like this ? This is for
>> development and would not be used in production, quantities would be
>> very small.
>>
>>
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