Well, I have never tried this but I would suggest to contact the aluminium
layer to set it at 0V. And put the voltage (-700V) on the Pyrex you want to
bond.
Let me know if you have any success, I would be interested as general
knowledge.
Best regards,
Vincent
------------------------------------------------------------------
Vincent Schneider
R&D Engineer

Debiotech S.A.                            Ph:               +41 21 623 60 00
Av. Sevelin 28                             Fax:             +41 21 623 60 01
1004 Lausanne                            Direct line:    +41 21 623 60 91
Switzerland                            mailto: [email protected]
------------------------------------------------------------------