PURPOSE: To provide the crystal resonator having a base cover of resin made with excellent moldability, heat resistance, strength and size accuracy by composition the base and/or cover of a molding formed by injection molding of liquid crystal resin.
CONSTITUTION: An electrode 2 is closely adhered to both sides of a crystal chip 1 and two lead wires 4 are connected from both ends via a conductive adhesives 3 and the lead wires 4 are fixed by a glass 5 and supported by a plate base 6 and the entire components are covered with a box shaped cover 7. The crystal resonator is composed of a molding whose base 6 and/or a cover 7 are formed by injection molding of liquid crystal resin. As a preferable liquid crystal resin, a liquid crystal polyester resin, a liquid crystal polycarbonate resin, a liquid crystal polyester amide resin or a liquid crystal polyether resin or the like is used. Through the constitution above, injection molding is attained even with a thin thickness, size accuracy is excellent and excellent strength and heat resistance are obtained.
| JPH03235087 | LOW POWER REFERENCE PULSE GENERATING CIRCUIT |
| JP2010067030 | NAVIGATION APPARATUS |
NAKAMURA SEIICHI
INOUE SHUNEI
