Gary,
Standard laminate thickness would depend on specific board shops and what
the have in stock. With all the available core thickness' along with various
pre-preg options there's really nothing that can't be achieved given a
little imagination. In the past I have pressed a 1 ply 106 preg for a
customer which pressed out at .0015. As far as cost adders I guess the labor
involved to create a thickness that they do not have on hand would come into
play. Here is an example of what we carry in FR-4 laminate. .003, .005,
.008, .010, .012, .014, .016, .018, .021, .028, .039, .047, .059, .093,
.125. Throw any variety of pregs between and as I stated use your
imagination.There are things to take into consideration. For example, if you
want to maintain consistent dielectric thickness, using a core rather than
preg will give you more consistent results. Hope this helps,
Dan S
----- Original Message -----
From: "Gary Camac" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, June 27, 2008 11:40 AM
Subject: [TN] Cost Implications of Non-standard Laminate Thickness
Good Friday to all,
I was asked by one of my design engineers:
What is considered as standard laminate thickness, if such exists, for
cores and layers?
What is the cost incurred when non-standard thickness are specified?
I usually bounce these questions off my PWB suppliers, but thought I
would broaden my input. Any assistance would be appreciated.
Best regards,
Gary
Gary Camac
Senior Manufacturing Engineer
DICKEY-john Corp.
5200 Dickey John Road
Auburn, IL 62616-0010
Telephone 217-438-2288
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