| 摘要 |
PURPOSE:To simplify the structure of a cap, and to facilitate assembly by a method wherein the inner end section of a lead member is bent in a stepped manner along a recessed section in a case member, and fixed to the base of the recessed section in the case member through a glass material together with a pellet, and a cap member is shaped to a flat tabular form, and sealed to the upper surface of the case member through the glass material. CONSTITUTION:The inner end side 3a of a lead member is welded to the base of a recessed section if a case member at a temperature of approximately 450 deg. through glass 7, and the lead member is welded to the upper surface of the case member through glass 8 at the central section of the lead. A semiconductor pellet 5 to which an EPROM element is shaped is fastened to the base of the recessed section in the case through glass 7 at the same low position as the inner lead 3a. The pellet 5 and the inner leads 3a are wire-bonded by small-gage wires 10 consisting of gold or aluminum under the state. A flat tabular cap member 11 composed of high-purity alumina ceramics, through which ultraviolet rays can be transmitted, or transparent glass is sealed to the upper surface of the ceramic case through glass 8 so as to hold the lead. A frame section in a lead frame is cut off after glass sealing. |
