摘要:
A silicon oxide film 102, a Pt film 103x, a Ti film 104x and a PZT film 105x are deposited in this order over a Si substrate 101. The Si substrate 101 is placed in a chamber 106 so that the PZT film 105x is irradiated with an EHF wave 108. The irradiation with the EHF wave locally heats a dielectric film such as the PZT film. As a result, it is possible to improve, for example, the leakage property of the dielectric film without adversely affecting a device formed on the Si substrate 101.
摘要:
An image forming apparatus includes an image forming portion for forming an image, an image reading portion for reading an image, displaceable with respect to the image forming portion, and an open/closable member that can be opened or closed with respect to a main body of the image forming portion and displaced toward the image reading portion, wherein the displacement of the open/closable member is effected in relation to the displacement of the image reading portion. In this manner the open/closable member can be opened or closed by a simple operation, without increasing the dimension of the image forming apparatus.
摘要:
A semiconductor device of this invention includes: a semiconductor substrate; a gate electrode formed on the semiconductor substrate; a pair of source and drain electrodes respectively formed in regions of the semiconductor substrate situated on opposite sides of the gate electrode in a plan view; and a germanium-containing channel layer situated below the gate electrode to sandwich an gate insulator therebetween and intervening between the pair of source and drain electrodes, wherein a silicide layer forming at least a part of the source and drain electrodes has a lower germanium concentration than the channel layer.
摘要:
This specification relates to a process for manufacturing a semiconductor device, comprising the steps of: forming a lower gate electrode film on a semiconductor substrate 10 via a gate insulating film 11; forming an upper gate electrode film on the lower gate electrode film, the upper gate electrode film being made of a material having a lower oxidation rate than that of the lower gate electrode film; forming a gate electrode 12 by patterning the upper gate electrode film and the lower gate electrode film, the gate electrode 12 comprising a lower gate electrode element 12a and an upper gate electrode element 12b; forming source/drain regions 15 by introducing an impurity into the semiconductor substrate 10; and forming oxide film sidewalls 13 by oxidizing the side faces of the lower gate electrode element 12a and the upper gate electrode element 12b, the thickness of the oxide film sidewalls 13 in the gate length direction being larger at the sides of the lower gate electrode element 12a than at the sides of the upper gate electrode element 12b.
摘要:
A semiconductor integrated circuit fabrication method according to this invention includes: a step of forming a pair of first device forming regions and a pair of second device forming regions in a surface layer portion of a semiconductor substrate by surrounding each of the regions by device isolation; a step of forming a first oxide film covering the surface of the semiconductor substrate after the preceding step; a step of removing an intended portion of the first oxide film to expose the pair of second device forming regions; a step of forming a pair of heterojunction structures, by selective epitaxial growth, on the pair of second device forming regions thus exposed; a step of forming a second oxide film covering the surface of the substrate after the preceding step; and a step of forming a pair of gate electrodes above each of the pair of first device forming regions and the pair of second device forming regions, whereby a normal complementary MOS transistor and a heterojunction complementary MOS transistor are eventually formed in the pair of first device forming regions and the pair of second device forming regions, respectively.
摘要:
A semiconductor integrated circuit comprising a plurality of bipolar transistors that are produced by forming, in a plurality of transistor-producing regions (A1 and A2), a first conductive type emitter layer (6) on the front surface side of a second conductive type base layer (4) that is formed on the surface side of a first conductive collector layer (2) and contains germanium, the first conductive type emitter layer (6) being formed from a semiconductor material having a band gap larger than the base layer (4); wherein the concentrations of impurities contained in the emitter layers (6, 61) vary among the plurality of transistor-producing regions (A1, A2), and the germanium concentrations differ in the base-emitter junction interfaces of at least two of the transistor-producing regions (A1, A2), such that the ON-state voltages required for turning the plurality of bipolar transistors into an ON state differ from each other. This semiconductor integrated circuit makes it possible to reduce power consumption while maintaining the excellent performance of a bipolar transistor.
摘要:
A HDTMOS includes a Si substrate, a buried oxide film and a semiconductor layer. The semiconductor layer includes an upper Si film, an epitaxially grown Si buffer layer, an epitaxially grown SiGe film, and an epitaxially grown Si film. Furthermore, the HDTMOS includes an n-type high concentration Si body region, an n− Si region, a SiGe channel region containing n-type low concentration impurities, an n-type low concentration Si cap layer, and a contact which is a conductor member for electrically connecting the gate electrode and the Si body region. The present invention extends the operation range while keeping the threshold voltage small by using, for the channel layer, a material having a smaller potential at the band edge where carriers travel than that of a material constituting the body region.
摘要:
A HDTMOS includes a Si substrate, a buried oxide film and a semiconductor layer. The semiconductor layer includes an upper Si film, an epitaxially grown Si buffer layer, an epitaxially grown SiGe film, and an epitaxially grown Si film. Furthermore, the HDTMOS includes an n-type high concentration Si body region, an n− Si region, a SiGe channel region containing n-type low concentration impurities, an n-type low concentration Si cap layer, and a contact which is a conductor member for electrically connecting the gate electrode and the Si body region. The present invention extends the operation range while keeping the threshold voltage small by using, for the channel layer, a material having a smaller potential at the band edge where carriers travel than that of a material constituting the body region.
摘要:
In a bipolar transistor block, a base layer (20a) of SiGe single crystals and an emitter layer (26) of almost 100% of Si single crystals are stacked in this order over a collector diffused layer (9). Over both edges of the base layer (20a), a base undercoat insulating film (5a) and base extended electrodes (22) made of polysilicon are provided. The base layer (20a) has a peripheral portion with a thickness equal to that of the base undercoat insulating film (5a) and a center portion thicker than the peripheral portion. The base undercoat insulating film (5a) and gate insulating films (5b and 5c) for a CMOS block are made of the same oxide film. A stress resulting from a difference in thermal expansion coefficient between the SiGe layer as the base layer and the base undercoat insulating film 5a can be reduced, and a highly reliable BiCMOS device is realized.
摘要:
The present invention provides a curable resin composition having good curability and storage stability, which provides a cured film having excellent weather resistance, acid resistance and mar resistance. The curable resin composition comprises:(a) 20 to 80% by weight of a polycarboxylic acid having an acid value of 25 to 300 mg KOH/g based on solid and a number average molecular weight of 500 to 20000; and(b) 20 to 80% by weight of a polyepoxide having an epoxy equivalent of 100 to 800 and a number average molecular weight of 500 to 20000, prepared by copolymerizing: (1) 10 to 60% by weight of a long-chain epoxy monomer; and (2) 40 to 90% by weight of an ethylenically unsaturated monomer having no epoxy group. The present invention also provides a process for forming a cured film using the resin composition.