Via Technologies, Inc.

Felix Kao

Jay Yu

Chih-Long Ho

Bour-Yi Sze

An integrated circuit design for differential variable capacitors uses an integration method to integrate an integrated circuit having differential variable capacitors as a whole, and takes the parasitic effect into consideration for the manufacturing process to lower the circuit inaccuracy and reduce the chip size effectively. Such arrangement lowers the manufacturing cost, identifies the quality of loading quality of the overall variable capacitance during the manufacture, and further controls the quality of loading capacity of the overall variable capacitance effectively. Furthermore, this invention does not need to reposition for the symmetrical position of the coils, and thus giving a very precise positioning to reduce the level of difficulty for the manufacture.

Differential variable capacitors and their applications

An inductor includes a substrate, a first insulation layer, a second insulation layer, a first conductive section, a second conductive section, a third conductive section, and a fourth conductive section. The first conductive section and the second conductive section are symmetrical with respect to a first line. The third conductive section and the fourth conductive section are also symmetrical with respect to the first line. The first end of the first conductive section is connected to the first end of the fourth conductive section with a first via plug. The first end of the second conductive section is connected to the first end of the third conductive section with a second via plug.

Multi-level symmetrical inductor

An integrated circuit transformer includes a first conductive segment, a second conductive segment, a fifth conductive segment, and a sixth conductive segment, all disposed inside a first insulating layer. The first conductive segment, the second conductive segment, the fifth conductive segment, and the sixth conductive segment are respectively symmetric to a first line. The transformer further includes a third conductive segment and a fourth conductive segment, both formed inside a second insulating layer. The third conductive segment and the fourth conductive segment are symmetric to a second line. The transformer further includes a fist connection conductive segment connecting the fifth conductive segment to the second conductive segment, and a second connection conductive segment connecting the sixth conductive segment to the first conductive segment.

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Taipei, Taiwan

Felix Kao