Job Description:

• 1) Prepares ampoule containing charge to grow gallium arsenide crystal ingot in crystal growing furnace: Cleans ampoules, plugs, and boats, using etch tanks and sandblasting equipment.

• 2) Operates saw to cut remelt into sections of specified size.

• 3) Immerses remelt into etch tank to remove contaminants, and dries remelt in oven.

• 4) Measures and weighs specified amounts of crystal growing material, such as seed, seed powder, remelt, and dopant, and loads material into boat and ampoule, following prescribed procedure.

• 5) Attaches ampoule to diffusion pump to remove air from ampoule, and seals ampoule, using blowtorch.

• 6) Transports sealed ampoule to holding rack in furnace room for further processing by CRYSTAL GROWER.

• 7) Records production information.