Browse Prior Art Database

Drawer Cell

IP.com Disclosure Number: IPCOM000081031D
Original Publication Date: 1974-Mar-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Barclay, DJ: AUTHOR [+4]

Abstract

As shown in Fig. 1, the cell incorporates a bottomless glass vessel 10 resting on a base 11. Base 11 comprises an upper polytetrafluoroethylene (PTFE) section 12, an intermediate nylon section 13, a lower PTFE section 14 and a PTFE drawer 15. The wall of glass vessel 10 fits in a recess in upper section 12 on an O-ring 16. The recess exposes a portion of PTFE drawer 15, which is slidable on rails 17 in and out of base 11.

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Drawer Cell

As shown in Fig. 1, the cell incorporates a bottomless glass vessel 10 resting on a base 11. Base 11 comprises an upper polytetrafluoroethylene (PTFE) section 12, an intermediate nylon section 13, a lower PTFE section 14 and a PTFE drawer 15. The wall of glass vessel 10 fits in a recess in upper section 12 on an O-ring 16. The recess exposes a portion of PTFE drawer 15, which is slidable on rails 17 in and out of base 11.

As best illustrated in Fig. 2, drawer 15 includes a well 18 into which a substrate 19 to be plated is inserted. The substrate is slid into the forward portion of well 18 where it is held between lips 20 and O-ring 21. The loaded drawer is then slid into base 11 and glass vessel 10 is filled with electrolyte. Because of the cantilever action of rails 17 leakage of electrolyte is minimal. Another feature of the drawer is a bore 22 from well 18 to a tap 23 by which electrolyte can be run off from the cell.

Ground glass top 24 carries a spring loaded rod electrode 25 for connecting the substrate 19 as a cathode, a coiled wire anode 26 and a reference electrode 27, which samples the electrolyte near the substrate by a capillary tube 28.

By means of the drawer 15, substrates 19 can be changed and returned to precisely the same plating position without any disturbance of the electrodes and without loss of electrolyte.

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