Abstract: In a method of manufacturing a thermal-type infrared sensor including a thermosensitive part, a bolometer material is formed as the thermosensitive part and is subjected to post-processing to control a temperature coefficient of resistance in the bolometer material. The bolometer material may be formed by titanium or vanadium.
Type:
Grant
Filed:
October 29, 1997
Date of Patent:
October 12, 1999
Assignees:
Director General, Technical Research and Development Institute, Japan Defense Agency, NEC Corporation
Inventors:
Hideo Wada, Mitsuhiro Nagashima, Tokuhito Sasaki, Naoki Oda
Abstract: At a heat treatment temperature in a reducing atmosphere of Ar and H.sub.2, a precursory film of V.sub.2 O.sub.5 is reduced into a VO.sub.x film with the heat treatment temperature selected in a predetermined temperature range between 350 .degree. C. and 450.degree. C., both exclusive, to control a resistivity of the VO.sub.x film, where x is greater than 1.875 and less than 2.0. The VO.sub.x film is not susceptible to a metal-semiconductor phase transition inevitable in VO.sub.2 at about 70.degree. C. and is excellent for use in a bolometer-type infrared sensor. When reduced at 350.degree. C. and 450.degree. C. the resistivity and its temperature coefficient of the VO.sub.x film at room temperature are 0.5 and 0.002 .OMEGA. cm and -2.2% and 0.2% per degree Celsius.
Type:
Grant
Filed:
November 22, 1996
Date of Patent:
September 1, 1998
Assignees:
Masahiro Ota, Director General, Technical Research and Development Institute, Japan Defense Agency, NEC Corporation
Abstract: A gas-generating agent for use in a ducted rocket engine essentially consists of an aliphatic polyester represented by the formula: ##STR1## or the formula: ##STR2## and a curing agent and optionally incorporating therein additives such as a curing catalyst.
Type:
Grant
Filed:
October 10, 1989
Date of Patent:
May 15, 1990
Assignees:
Japan as represented by Director General, Technical Research and Development Institute, Japan Defense Agency, Nippon Oil & Fats Co., Ltd.
Abstract: A high toughness, ultra high-strength steel having an excellent stress corrosion cracking resistance with a yield stress of not less than 110 kgf/mm.sup.2, which comprises 0.06-0.20 wt % of C, not more than 0.35 wt % of Si, 0.05-1.0 wt % of Mn, 8-11 wt % of Ni, 0.2-2.5 wt % of Cr, 0.7-2.5 wt % of Mo, 0.05-0.2 wt % of V, 0.01-0.08 wt % of Al, not more than 0.005 wt % of N, not more than 0.003 wt % of O, provided that the value of Al (%).times.N (%).times.10.sup.4 is not more than 1.5, and the balance being substantially Fe and inevitable impurities.
Type:
Grant
Filed:
April 22, 1987
Date of Patent:
March 21, 1989
Assignees:
Japan as Represented by Director General, Technical Research and Development Institute, Japan Defense Agency, Nippon Steel Corporation, Kawasaki Steel Corporation