Abstract: In a compound semiconductor device such as a magnetoresistance element or Hall element having a compound semiconductor portion such as of InSb and an electrode portion, a portion of the compound semiconductor portion is exposed to energy irradiation to be converted into an alloy state or amorphous state and rendered conductive to form the electrode portion. The portion rendered conductive is contiguous to and in ohmic contact with the unexposed portion of the compound semiconductor and used as a shorting bar electrode or an external lead bonding pad.

Abstract: A semiconductor magnetoresistive element with at least one intermediate terminal comprises first and second electrodes formed at opposite ends of a magnetosensitive portion of the semiconductor magnetoresistive element, a third electrode interposed between the first and second electrodes, and a plurality of shorting bars disposed, with electrical isolation from each other, on at least one of respective sections of the magnetosensitive portion between the first and third electrodes and between the second and third electrodes, whereby the magnetic sensitivity characteristic of the magnetosensitive section between the first and third electrodes is rendered different from that of the magnetosensitive section between the second and third electrodes.

Abstract: Deposited on a glass or ceramic substrate for a thin-film microcircuit board such as a hybrid IC board or a transparent electrode is a thin-film laminate, which comprises a dispersion metal thin-film dispersible and evaporable upon application of an energy above a threshold value and an electrical property-imparting film defining a conductor or a resistor. Then a high intensity of light having an energy sufficient to cause dispersion is applied selectively on the thin-film laminate, thereby removing exposed portions of the thin-film laminate as a result of dispersion and evaporation thereof. Unexposed portions of the thin-film laminate provide a desired pattern. The electrical property-imparting film is a thin-film of noble metal such as gold, silver or platinum or a thin film of transparent electrode material such as SnO.sub.2 or In.sub.2 O.sub.3, which is not easily dispersible upon application of the above energy.

Abstract: An organic polar solvent-soluble aromatic polyamide-imide having therein aromatic nuclei linked at their respective 1- and 3-positions and having therein amide linkages and terminal groups unsubstituted or partially substituted with acrylate or methacrylate groups is found to impart excellent heat resistance and insulating property to a photoresist composition produced therefrom.

Abstract: An organic polar solvent-soluble aromatic polyamide-imide having therein aromatic nuclei linked at their respective 1- and 3- positions and having therein amide linkages and terminal groups partially substituted with cinnamate groups is found to impart excellent heat resistance and insulating property to a photoresist composition produced therefrom.