Silicon-on-insulator silicon germanium heterojunction bipolar transistor (SOI SiGe HBT) planar integrated device and preparation method thereof

Abstract

The invention discloses a silicon-on-insulator silicon germanium heterojunction bipolar transistor (SOI SiGe HBT0 planar integrated device and a preparation method thereof. The preparation method comprises following steps of continuously growing N-channel silicon (N-Si), P-channel silicon germanium (P-SiGe) and an N-channel silicon (N-Si) layer to deposit a dielectric layer to prepare shallow-trench isolation, photo-etching a collector region shallow-trench isolation area, preparing a collector region shallow-trench isolation, etching and depositing a dielectric layer, photo-etching a base-region shallow-trench isolation area, preparing a base-region shallow-trench isolation, photo-etching a collector region and injecting phosphorous ions to form a collector electrode contact region, photo-etching a base region and injecting boron ions to form a base electrode contact area, finally forming a SiGe HBT device, finally photo-etching a transmitting region lead hole, a base region lead holeand a collector region lead hole, metalizing, photo-etching leads, and forming an HBT integrated circuit with the thickness of the base region of 20 to 60nm. The technical method provided by the invention is compatible with the processing technique of the traditional CMOS integrated circuit, so that under the situation that the fund and the equipment investment are small, the SOI-based bipolar complementary metal-oxide semiconductor (BiCMOS) device and an integrated circuit are prepared, and the performance of the traditional analog and digital mixed integrated circuit is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of semiconductor integrated circuits, and in particular relates to an SOI SiGe HBT planar integrated device and a preparation method. Background technique [0002] Integrated circuits are the cornerstone and core of the economic development of an information society. Just as the American engineering and technology circle recently named the fifth electronic technology among the 20 greatest engineering and technological achievements in the world in the 20th century, "from vacuum tubes to semiconductors and integrated circuits, they have become the cornerstone of intelligent work in various industries today." Integrated circuits. It is one of the typical products that can best reflect the characteristics of knowledge economy. At present, the electronic information industry based on integrated circuits has become the world's largest industry. With the development of integrated circuit technology, the clear bou...

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Problems solved by technology

Although GaAs and InP-based compound devices have superior frequency characteristics, their preparation process is more complicated than Si process, high cost, difficult to prepare large-diameter single crystal, low mechanical strength, poor heat dissipation performance, incompatibility with Si process and lack of SiO 2 Such passivation layer and other factors limit its wide application and development.

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