The invention discloses a method for improving the stability of an absolute pressure type
pressure sensor and the absolute pressure type
pressure sensor, and the method comprises the steps: placing an absolute pressure
chip in a square groove of a
sintering pedestal, and carrying out the positioning of the absolute pressure
chip; dispensing glue on the periphery of the
sintering base, and bonding the
ceramic insulating cover in the inner cavity of the
sintering base; a circuit on the absolute pressure
chip is connected with a pin on the sintering base through a gold wire, and the pressing ring, the corrugated diaphragm and the sintering base are welded and fixed; a cavity between the corrugated diaphragm and the sintering base is filled with
silicone oil, and the cavity is sealed through steel balls. According to the method, in the process of improving the stability of the absolute pressure type
pressure sensor, the square groove is formed in the sintering base, and the absolute pressure chip is placed in the square groove of the sintering base, so that on one hand, the absolute pressure chip can be effectively positioned; the
internal stress generated by thermal mismatch caused by material performance mismatch between the
adhesive and the sintering base and between the
adhesive and the chip is eliminated, and the stability of the absolute pressure chip sensor is improved.