Multipurpose low-thermal-mass chuck for semiconductor processing

Details Multipurpose low-thermal-mass chuck for semiconductor processing Multipurpose low-thermal-mass chuck for semiconductor processing

1990-08-10

1993-03-09

Paschall, Mark H.

Electric heating

Metal heating

By arc

21912149, 2191214, 219158, 156345, B23K 900

Patent

active

051928493

ABSTRACT:
A multipurpose low-thermal-mass radio-frequency chuck for semiconductor device processing equipment (18) and applicable to plasma processing over a wide range of substrate temperatures. The stacked multilayer chuck structure comprises process vacuum base plate (16), heating module (48), cooling module (44) and radio-frequency power plate (50). Vacuum base plate (16) provides mechanical support and necessary feed-throughs (RF power connection, coolant inlet/outlet, heater wires and thermocouple) for main chuck (20). Water-cooled vacuum base plate (16) is thermally insulated from main chuck module (20). Heating element (48) comprises top layer (80) of electrical insulation and passivation, power heating resister (82), bottom layer of electrical insulation (84) and heater substrate (86) made of boron nitride or quartz or SiC-coated graphite. Coolant module (44) comprises a plurality of coolant tunnels and is made of a high thermal conductivity material (nickel-plated copper, aluminum or a suitable refractory metal). Radio-frequency plate (50) comprises a refractory metal or aluminum material.

REFERENCES:
patent: 4361749 (1982-11-01), Lord
patent: 4430547 (1984-02-01), Yoneda et al.
patent: 4565601 (1986-01-01), Kakehi et al.
patent: 4631106 (1986-12-01), Nakazato et al.
patent: 4886571 (1989-12-01), Suzuki et al.
patent: 4971653 (1990-11-01), Powell et al.

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