摘要:
The invention concerns a method which consists in: (a) stabilization of the monocrystalline silicon substrate temperature at a first predetermined temperature T1 of 400 to 500° C.; (b) chemical vapour deposition (CVD) of germanium at said first predetermined temperature T1 until a base germanium layer is formed on the substrate, with a predetermined thickness less than the desired final thickness; (c) increasing the CVD temperature from said first predetermined temperature T1 up to a second predetermined temperature T2 of 750 to 850° C.; and (d) carrying on with CVD of germanium at said second predetermined temperature T2 until the desired final thickness for the monocrystalline germanium final layer is obtained. The invention is useful for making semiconductor devices.
摘要:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a highly doped semiconductor wafer whereby the dislocation-free semiconductor wafer with a small specific resistance is manufactured by using smaller amounts of doping agents compared to the amount used when using a single doping agent. SOLUTION: At least two electrically active doping agents belonging to the same group in the periodic table of chemical elements are used for doping. COPYRIGHT: (C)2005,JPO&NCIPI
摘要:
PROBLEM TO BE SOLVED: To make uniform the film thickness of a deposition film formed on a wafer due to liquid phase growth over the entire wafer. SOLUTION: The wafer supported by a wafer-supporting pin is dipped into a solution containing a growth material, and the deposition film is grown on the wafer. In that case, an atmospheric gas is fed into the central section of the solution that fills a crucible using a breather, thus positively cooling the central section of the solution.
摘要:
PROBLEM TO BE SOLVED: To obtain a high quality hydrogen semiconductor thin film having the controlled coupling state between IV group atoms and in-film hydrogen atoms, and also having little structural turbulance to obtain excellent characteristic of the semiconductor thin film manufactured by performing a low temperature process, and to obtain a thin film device showing excellent characteristic using the above-mentioned semiconductor thin film. SOLUTION: This is a semiconductor thin film which is mainly composed of IV group atoms and hydrogen atoms which are deposited at the base layer temperature of 40 deg.C or lower as the main constituent element using a chemical vapor phase reaction growth method, and in the heating temperature dependency of the quantity of discharge of hydrogen atoms in film when it is heated up from room temperature, the semiconductor thin film shows a profile having the peak of the quantity of emission of hydrogen at 300 to 410 deg.C. An electrode part consists of a semiconductor thin film which is characterized that half power width of the above-mentioned peak is 30 deg.C or lower, a semiconductor unit part containing the above-mentioned semiconductor thin film, and an electrode comprising a conductive thin film, and they are formed on the same substrate in the thin film device.
摘要:
PROBLEM TO BE SOLVED: To provide a method for forming a satisfactorily crystalline GeC mixed crystal thin film without fetching any carbon as amorphous carbon. SOLUTION: At the time of forming a mixed crystal thin film containing carbon 13 and germanium 12 on a substrate 11, the carbon 13, germanium 12, and atomic hydrogen 14 are supplied to the surface of the substrate 11. The atomic hydrogen 14 can remove the amorphous carbon 15 existing on the substrate 11 by converting it into the form of a reaction product 16. Thus, a satisfactorily crystalline mixed crystal thin film containing germanium and carbon can be obtained.