Re: Very small details

From: aaroflex (
Date: Wed Mar 03 1999 - 00:20:52 EET

You are pushing the limit for present sla machines. Recently, we successfuly
fabricated an array of holes 20 mills on center with diameter of 15 mills on
one of our smaller machines. The wall thickness between holes was near 5
mills. The part passed a go-nogo test with a 13 mill rod. AAROFLEX, Inc.
fabricated a similar part you desire, but the accuracy was different on the X
side of the square as opposed to the Y side of the square. The X is 1000
counts per inch and the Y is 1750 counts per inch. Another item is the
temperature. RPC has a glass transition of 81 C. While Dupont has a glass
transition of 86 C with a Heat Deflection Temperature of 102 C. AAROFLEX, Inc.
will run a test run for you to demonstrate the results if you think this data
may be acceptable to you. We can double the accuracy and reduce the spot size
by reducing the focal length from 50" to 25" for a small platform. I can
demonstrate this to you if the volume can justify such a change to a machine.

Good Luck,

Albert C. Young, Jr., P.E.

Wayne L Foss wrote:

> I have a potential need for a source that can produce small, highly
> detailed parts to the specifications that follow. The part will be used for
> isolating and mounting IC chips in a test fixture. Dimensions are in
> inches.
> The part will have .007 thick fins that are .100 high and .050 wide. They
> may be attached to a solid structure at one end (along the .100) and/or the
> bottom (along the .050). There is a space between fins of .010 which makes
> the pitch .017. This part will fit over (or under) the IC and the fins will
> fit in between the "waterfall" of the leads. There are 60 leads per side
> for a total of 240. The material must be strong, withstand a temperature of
> 125 degrees C and must be electrically non-conductive.
> I do not have drawings yet. We will consider any process.
> I do know of Pure Fluid Magic, but Ms. Iverson, in my last conversation
> with her, indicated that she was not taking on any outside projects.
> Thanks in advance for your help.
> Wayne Foss
> Rockwell Collins, Inc.
> Cedar Rapids, Iowa.
> For more information about the rp-ml, see

For more information about the rp-ml, see

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