Crystal
Wash : |
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1 |
Carriers stacked in bottom possibly
dampening ultrasonic energy. |
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2 |
Carriers are made of Teflon? , could
a stainless steel carrier enhance the ultrasonic energy? |
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3 |
What is the particulate levels on
the crystal blanks is this an issue? Being trapped by carriers? |
4 |
Has an inspection been done on the
crystal blanks to look for particulate or residual? |
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5 |
What is the resistivity of the DI
water for the final rinse? |
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6 |
What ultrasonic frequency is being
used ? |
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Baseplate: |
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1 |
How close to actual frequency is the
baseplating being done? |
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2 |
What is the range coming out of
Baseplate? Approx. 1500ppm |
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3 |
What is the thickness of the NiCr
layer plated prior to Gold? |
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4 |
What is the range going into
Baseplate? |
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5 |
What is the plating rate? |
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6 |
Monitor crystal not reading
correctly? Short on the wire going to
the monitor crystal |
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7 |
How often is the monitor crystal
changed? (6 Mhz?) |
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Xtal Mount: |
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1 |
Does eliminating brush wash after
Mount change the aging data? |
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2 |
Is brush wash effective at removing
particulate from both sides of the crystal? |
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4 |
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Finish Plate: |
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1 |
Sticks being returned to Transat to
be looked at (design issue with sticks, thermal coupling) |
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2 |
Finish Plater gaining capacitance
causing crystals to read ok but are actually high in frequency |
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Miscellaneous: |
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1 |
What kind of data is being taken in
process and how is it used? Any yield tracking? |
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Is there some type of identifier in
process which correlates to the aging data? |
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3 |
Square packages had a lot of
leakers, Finish Plate fixture needs to be redone so that |
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units can be read easier and aren't
so tight in fixture. (bent flange) |
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