PLASMA TREATMENT AND APPARATUS IN ELECTRONIC DEVICE MANUFACTURE

摘要

In the manufacture of a large-area electronic device such as a large-area liquid-crystal display device with thin-film address and drive circuitry, a plasma treatment is carried out on a device substrate (4) which is mounted on a supporting electrode (11) facing a perforated gas-feeding electrode (12). A reactive plasma (5) is generated in a space between the electrodes (11, 12) from a mixture of reaction gases which is fed into the space through at least the perforated electrode (12). The mixture of gases comprises a first reaction gas (e.g. SiH4) which is depleted at a faster rate in the plasma treatment than a second reaction gas (e.g. N2). Through an area (12b) of the perforated electrode, one or more second supply lines (22) feeds a secondary mixture which is richer in the first reaction gas than a primary mixture supplied by a first supply line (21). This arrangement permits the plasma treatment to be carried out more uniformly over the area of the supporting electrode (11).