Hi TechNet

I got so many notes of people that are interested in the 3D graph I
mentioned that I decided it might be the easiest ( for me ) to send the
data to TechNet since I can't send a picture. Those who are interested can
use the data to make their own graph with any data handling program. I
there is still someone having problems please feel free to contact me
again.

1. Specimen preparation:
Test boards where produced with drills of various age with various feeding
and various final plating thickness ( electroless plus electrical ).

2. Analysis:
Of each drill-feeding rate combination some samples have been drawn after
electroless plating. microsections of the holes where done without
embedding the specimen in resin. With transmission illumination the opened
holes where investigated. Not plates glass fibres where clearly visible as
bright spots.
The soldered specimen where investigated with microsections.

This work was done approx. 4 years ago at Siemens.
Due to the test set-up it is clear, that not all possible measurement
points could be found.

3. Graph
- X Axis ( classes of average final plating thickness )
- Y Axis ( classes of average amount of not metallised fibres after
electroless plating )
- Z Axis ( average amount of voids in the solder )

Data matrix as follows
- Top horizontal row = X Axis
- Left vertical row = Y Axis
- centre data = Z Axis


             I 24-30 I 24-34 I 26-32 I 28-38 I 28-42 I 30-36 I 30-40
---------------------I-------I-------I-------I-------I-------I------
0            I   8   I       I       I       I   4   I       I   1
1-10         I  20   I       I       I       I       I       I
11-30        I       I       I       I   30  I       I       I   80
More than 30 I       I  172  I  165  I       I       I  95   I


Best regards

Guenter Grossmann


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