Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a bipolar transistor structure, capable of reducing the parasitic capacitance. SOLUTION: A method for forming a vertical bipolar transistor, comprising the steps of forming a bipolar transistor on silicon semiconductor substrate 11 which has an upper surface; forming STI regions 14 which are made of dielectric materials and have an inside edge portion and an upper surface, respectively; forming a doped collector region C between a pair of STI regions; also forming a counter doped intrinsic base region IB between the pair of STI regions, wherein there is each margin between the intrinsic base region and the pair of STI regions, and the intrinsic base region has edges; forming a doped-emitter region on the intrinsic base region apart from the edges; and forming shallow separated extension regions IE made of dielectric materials in the above margins, and placing them in parallel with the edges of the intrinsic base region; and forming an outer base region which covers the shallow separated extension regions partially, and further extends to the intrinsic base region, thereby physically and electrically contacting with the intrinsic base region. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a self-aligning oxide mask formed by utilizing the difference in oxidation speed between different materials. SOLUTION: The self-aligning oxide mask is formed on a CVD growth base NPN base layer including a single crystal Si52 (Si/SiGe) in an active area and a poly-crystal Si51 (Si/SiGe). The self-aligning mask is fabricated by utilizing the fact that the poly-crystal Si (Si/SiGe) oxidizes faster than the single crystal Si (Si/SiGe). By using the thermal oxidation method, a thick oxide layer is formed on the poly-crystal Si (Si/SiGe) and a thin oxide layer is formed on the single crystal Si (Si/SiGe), thereby the oxide films are formed on both the poly-crystal Si (Si/SiGe) and the single crystal Si (Si/SiGe), and by the control of etching of the oxide, the thin oxide layer on the single crystal Si (Si/SiGe) is removed while the self-alignment oxide mask layer is left on the poly-crystal Si (Si/SiGe). COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a method capable of not only manufacturing an SiGe hetero junction bipolar transistor but also improving the yield of an SiGe bipolar. SOLUTION: The present method includes ion implantation of carbon C into one of the following element regions i.e. a collector region, subcollector region, external base region, and collector-base junction region. In a preferred embodiment, implanted C is involved in each of the foregoing regions. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for forming a BiCMOS integrated circuit having a raised external base. SOLUTION: This method comprises a step for forming a polycrystal silicon layer on the surface of a gate dielectric substance 18 provided on a substrate having a device section 14 in which a bipolar transistor is formed and a device section 16 in which a CMOS transistor is formed. Then, the polycrystal silicon layer is patterned, and a sacrifice polycrystal silicon layer is formed above the device section in which the bipolar transistor is formed and the section around it. Meanwhile, a gate conductor is provided in the device section in which the CMOS transistor is formed at the same time. Then, a spacer 30 is provided around each of the gate conductor. Then a part of the sacrifice polycrystal silicon layer on the bipolar device section is selectively removed to provide an opening in the device section in which the bipolar transistor is formed. Then the bipolar transistor having a raised external base 58 is formed at the opening. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
Disclosed is an improved semiconductor structure 150 (e.g., a silicon germanium (SiGe) hetero-junction bipolar transistor 100) having a narrow essentially interstitial-free SIC pedestal 120 with minimal overlap of the extrinsic base 104. Also, disclosed is a method of forming the transistor which uses laser annealing, as opposed to rapid thermal annealing, of the SIC pedestal to produce both a narrow SIC pedestal and an essentially interstitial-free collector. Thus, the resulting SiGe HBT transistor can be produced with narrower base 103 and collector space-charge regions than can be achieved with conventional technology.
Abstract:
A structure and a method for forming the same. The structure includes (a) a substrate, (b) a semiconductor fin region on top of the substrate, (c) a gate dielectric region on side walls of the semiconductor fin region, and (d) a gate electrode region on top and on side walls of the semiconductor fin region. The gate dielectric region (i) is sandwiched between and (ii) electrically insulates the gate electrode region and the semiconductor fin region. The structure further includes a first spacer region on a first side wall of the gate electrode region. A first side wall of the semiconductor fin region is exposed to a surrounding ambient. A top surface of the first spacer region is coplanar with a top surface of the gate electrode region.
Abstract:
A method for improving the SiGe bipolar yield as well as fabricating a SiGe heterojunction bipolar transistor is provided. The inventive method includes ion-implanting carbon, C, into at one of the following regions of the device: the collector region (16), the sub-collector region (14), the extrinsic base regions (29), and the collector-base junction region (27). In a preferred embodiment each of the aforesaid regions include C implants.
Abstract:
A method of forming a BiCMOS integrated circuit is provided which comprises the steps of: (a) forming a first portion of a bipolar device in first regions of a substrate; (b) forming a first protective layer over said first regions to protect said first portion of said bipolar devices; (c) forming field effect transistor devices in second regions of said substrate; (d) forming a second protective layer over said second regions of said substrate to protect said field effect transistor devices; (e) removing said first protective layer; (f) forming a second portion of said bipolar devices in said first regions of said substrate; and (g) removing said second protective layer.
Abstract:
A method of forming a semiconductor integrated circuit such as a BiCMOS integrated circuit comprises the steps of: (a) forming a first portion of a bipolar device in a first region of a substrate; (b) forming a first protective layer over the first region to protect the first portion of the bipolar devices; (c) forming field effect transistor devices in second regions of the substrate; (d) forming a second protective layer over the second regions of the substrate to protect the field effect transistor devices; (e) removing the first protective layer; (f) forming a second portion of the bipolar devices in the first region of the substrate; and (g) removing the second protective layer.