Temperature compensated crystal oscillator
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorChan Yong Jeong
Life of this patent
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Abstract
A temperature compensated crystal oscillator has first and second layered structures, an IC chip, a crystal vibrating chip, a resin mold portion and a metal cover. Each of the first and second layered structures has a cavity formed therein. The cavity formed in the second layered structure does not overlap with the cavity of the first layered structure. The IC chip is inserted into the cavity of the first layered structure. The crystal vibrating chip is inserted into the cavity of the second layered structure. The resin mold portion is formed by charging resin into the cavity of the first layered structure. The metal cover is arranged on the upper surface of the second layered structure for covering an opening of the cavity of the second layered structure.
Claims12
A temperature compensated crystal oscillator, comprising:
- a first layered structure comprising at least one layer and being provided with a cavity formed therein;
- a second layered structure arranged on an upper surface of the first layered structure, said second layered structure comprising at least one layer and being provided with a cavity formed in a region that does not overlap the cavity of the first layered structure;
- an IC chip received in the cavity of the first layered structure;
- a crystal vibrating chip received in the cavity of the second layered structure;
- a mold portion made of resin received in the cavity of the first layered structure that accommodates the IC chip, said mold portion having a bottom surface flush with a bottom surface of the first layered structure;
- and
- a sealing cover arranged on an upper surface of the second layered structure and covering the cavity formed in the second layered structure;
- wherein the first layered structure comprises two layers, and the cavity of the first layered structure is an integrated cavity formed through the two layers.
A temperature compensated crystal oscillator, comprising:
- a first layered structure comprising two layers and having a cavity extending through said two layers;
- a second layered structure arranged on an upper surface of the first layered structure and having a cavity that does not overlap the cavity of the first layered structure;
- an IC chip received in the cavity of the first layered structure;
- a crystal vibrating chip received in the cavity of the second layered structure;
- a resin filled in the cavity of the first layered structure below the IC chip;
- and
- a sealing cover arranged on an upper surface of the second layered structure and covering an opening of the cavity formed in the second layered structure.
Dependencies are inferred from the claim text.