Patent ID: 7709362
Filing Date: 2010-05-04
Classification: H01L,Y10T

Abstract:
1. A method for introducing impurities, comprising: a first step for irradiating a plasma containing Helium (He) to a surface of a single crystalline substrate so as to form an amorphous layer only in an upper portion of the single crystalline substrate; a second step for introducing impurities into the surface of the single crystalline substrate at which the amorphous layer has been formed; and annealing step after the second step, wherein: a bias voltage in time of irradiating the plasma is more than 30V (inclusive) and less than 310V (inclusive), the annealing step is a step for activating the impurities, the irradiating time regarding the plasma is not shorter than 5 seconds (inclusive) and shorter than 70 seconds (inclusive), the first step and the second step are performed in the same process chamber as sequential processes, and the single crystalline substrate is a silicon substrate.