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Model 4085M
3-20. How To Connect Test Samples
3-21 . Measurement is made at the m easurement pins of the 4085A, either through the
1 6072A Personality Board, which attaches to a wafer prober, or through one of th' e system
, test fixturll$, which mount on the 40Q5A. Table 1 -3 in ' Secti(ln I shows ,and briefly
describes the personality board and the available test fixutures.
connecting a sample for measurement depends on the sample type and the measurement
objectives and requirements. If you're m easuring discrete com ponents, packaged devices,
or certain m aterials, use one of the available test fixtures. If you're using a w afer prober
that is too small for the 4085A, or if you're using an environmental control chamber, use'
the 1 6077 A Extension Cable Fixture. Complete instructions on how to use the available
accessories are given in the operating note furnished with each accessory.
When using the 1 6 077 A with the 4085M, you need only one coaxial cable for each
set of m easurement pins, and you can increase cable length up to two meters.
Also, the SENSE and FORCE pins of the l 6069A and 16077 A m ust be shorted.
3-22. Repositioning Pin Boards
3-23. The standard 4085M has a full complement of 48 pin boards installed in the 4085M.
By combining system option D O l , 002, or 003 with option 004, however, it is possible to
configure a system with fewer pin boards. The minimum number of pin boards is 5. On
systems equipped with fewer than 48 pin boards, it is possible to repOSition any of the pin
boards if necessary. This is possible because the pin boards are identical and because it is
the pin board location, not the pin board, that is addressed by the system. Exam ples of
when it might be nec essary or desirable to reposition one or m ore pin boards are (I) when
the probe card on the w afer prober has been moved, reconfigured, or altered in some way
and (2) when a test fixture has been changed. For instructions on how to reposition a pin
board, refer to paragraph 4-2 1 .
Note -
Section
ill
The m ethod of
3-1 1
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