Patent ID: 6012193
Filing Date: 2000-01-11
Classification: B08B,G11B,H01L

Abstract:
A disc-shaped-workpiece washing apparatus including a transfer mechanism for transferring disc-shaped workpieces along a transfer path; a washing means for washing both surfaces of the transferred workpieces and the side thereof; an oscillating mechanism for oscillating the washing means back and forth in a direction substantially orthogonal to the transfer path; and a liquid supply mechanism for supplying a washing liquid to said workpieces, wherein:said washing means comprises multiple washing rollers rotatably disposed on both sides of the transfer path and driven by a motor, and the washing rollers are divided into forward-rotating rollers that contact the workpieces transferred on the transfer path while rotating in the forward direction relative to the transfer direction and backward-rotating rollers that contact the workpieces while rotating in the backward direction; and wherein:said transfer mechanism comprises multiple transfer rollers disposed along the transfer path at an interval smaller than the outer diameter of the workpieces and a motor that drives the transfer rollers, and wherein at least near said washing rollers, said transfer rollers are disposed in such a way that each said pair of two transfer rollers are opposed via the transfer path so that they can transfer the workpieces being washed by sandwiching the workpieces on both surfaces; and wherein said oscillating mechanism includes an oscillating arm connected to one of a pair of supporting frames which supports said multiple washing rollers; an oscillating gear means for oscillating the oscillating arm back and forth; and a motor that oscillates the oscillating gear means.