Hi TechNetters-

Can anyone help Mr. Dzigan wirh the following question?

As always, thanks for your participation.

Regards-

Chris


> In your document IPC-D-249, Paragraph 3.6.4.4. you state: "Interior holes
> in reinforcment shoud be at least 0.014" larger in diameter than the
> corresponding holes in flex circuit for registration allowance."
>
> We assume that when no diameter of hole is designated on rigid
> reinforcment, the above is valid.
>
> Our question is: Since no maximum diameter is stipulated, may the
> manufacturer of the board use any diameter he wishes (i.e. 10 times that
> size, 0.14" or more) or does the inference reflect 0.014" min. up to
normal
> registration allowance? If so, what would be normal registration
allowance?
>
> In other words: What should be the maximum reinforcement's  holes size if
> no maximum is define on the circuit drawing?
>
> Hillel Dzigan - Quality Manager
> Eltek Ltd.
> Phone +972-3-939-5022, Fax +972-3-930-9581
> P.O. Box 159, Petach-Tikva 49101, ISRAEL


Chris Jorgensen
Project Manager
IPC
2215 Sanders Rd.
Northbrook, IL 60062-6135
-p- 847-509-9700 x.328
-f-  847-509-9798
[log in to unmask]
http://www.ipc.org

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