Compact plastics encapsulated charge coupled device unit for mass prodn. - comprises semiconductor chip, lead frame, thin confining wall of thermosetting polymer, glass cover, metal wires, and cast body e.g for camcorder

摘要

The unit has (a) a semiconductor chip which has a CCD and which has contact pads (1a) and a light receiving section (16); (b) a lead frame which is integral with a chip mounting plate (2) and leads (3) having inner (3a) and outer (3b) connections; (c) a thin confining wall (4) of predetermined height, on the chip surface for enclosing the section (16); (d) a glass cover (5) on top of the wall (4) for tightly closing and allowing light passage to the section (1b); (e) metal wires ()6) for electrically connecting the chip contact pads (1a) to the inner connections (3a) of the lead frame; and (f) a cast body (7) for hermetically sealing the chip (1) and the inner connections (3a). Prodn. of the plastics-encapsulated CCD unit is also new. The confining wall (4) pref. comprises a thermosetting polymer which exhibits adhesive properties at the opposite end daces and which is hardened at above 150 deg.C for 1 hr. for bonding to the glass cover (5). The glass cover (5) pref. comprises highly transparent glass with a refractive index of ca. 1.5 and a transmission of at least 90%. USE/ADVANTAGE - The CCD unit is useful in a camcorder. The design allows simple and inexpensive mass prodn. of compact CCD units by transfer casting using an inexpensive plastics (esp. injection mouldable resin).