摘要:
A method of fabricating a semiconductor device includes the steps of forming a contact hole in an insulator layer, filling the contact hole by a conductor material, removing the conductor material from the upper major surface of the insulator layer to form a conductive plug such that the conductive plug fills the contact hole, applying an anisotropic etching process upon the insulator layer, such that the anisotropic etching process acts substantially vertically and selectively to the insulator layer, with an etching rate substantially larger than an etching rate for the conducive plug.
摘要:
A semiconductor integrated circuit device includes a substrate formed with semiconductor elements and a metal wiring having a laminated structure and provided on the substrate. The metal wiring includes a first layer including aluminum as a main component, and a second layer formed on the first layer. The second layer includes titanium and nitrogen as main components. The second layer includes more titanium than nitrogen in number of atoms. A third layer may be formed between the first and second layers. The third layer includes a compound of aluminum and titanium as a main component. A fourth layer may further be formed between the second and third layers. The fourth layer includes titanium as a main component and is free of aluminum.
摘要:
In an optical disk substrate film-formation apparatus which prepared an optical disk by forming a thin film on a substrate, the optical disk substrate is held by a holder section. A contact support surface is provided to the holder section which closely contacts at least a portion of the surface of the optical disk substrate rear to the surface where the think film is formed.
摘要:
In an optical disk substrate film-formation apparatus which prepared an optical disk by forming a thin film on a substrate, the optical disk substrate is held by a holder section. A contact support surface is provided to the holder section which closely contacts at least a portion of the surface of the optical disk substrate rear to the surface where the think film is formed.
摘要:
A method for forming ohmic contact has the steps of a) a process for forming an insulating film having a predetermined thickness on a diffusive layer formed on a semiconductor substrate; b) a process for forming a mask on the insulating film; the mask having a small selective ratio with respect to the insulating film and having an opening portion for a contact hole; c) a process for implanting ions into the diffusive layer through the opening portion; d) a process for taking heat treatment to electrically activate the implanted ions; e) a process for completely removing the mask and forming the contact hole by simultaneously etching the mask and the insulating film exposed through the opening portion of the mask; and f) a process for making an electrode come in ohmic contact with the semiconductor substrate exposed from the formed contact hole. In this method, the ohmic contact is formed with high accuracy with respect to a fine contact hole.
摘要:
In a manufacturing method of a semiconductor device, a gate insulating film is grown in an active region. Thereafter, an N-type polysilicon film is formed on the gate insulating film and is patterned so that a gate electrode and a polysilicon electrode are formed. Next, arsenic ions are implanted onto entire faces of the gate and polysilicon electrodes so that a source-drain region is formed on a substrate. An interlayer insulating film is then formed on an entire face of the source-drain region, etc. Thereafter, a contact hole is formed on a drain region in a position in which the drain region partially overlaps the polysilicon electrode. A surface portion of the polysilicon electrode is exposed into the contact hole. Thereafter, phosphoric ions are implanted through the contact hole with the interlayer insulating film as a mask. The implanted ions are thermally processed to activate these implanted ions. Thereafter, metal wiring is formed. Thus, resistance of a common contact having s three-dimensional structure is reduced.
摘要:
A surface-emitting laser device includes a transparent dielectric layer provided in an emitting region and configured to cause a reflectance at a peripheral part to be different from a reflectance at a central part in the emitting region. In the surface-emitting laser device, the thickness of a contact layer is different between a region having a relatively high reflectance and a region having a relatively low reflectance in the emitting region. The contact layer is provided on the high refractive index layer of an upper multilayer film reflecting mirror, and the total optical thickness of the high refractive index layer and the contact layer in the region having the relatively low reflectance is deviated from an odd number multiple of a one quarter oscillation wavelength of laser light emitted from the emitting region.
摘要:
A disclosed vertical cavity surface emitting laser element includes a substrate, a laminated body sandwiching a semiconductor active layer with an upper reflecting mirror and a lower reflecting mirror, a lower electrode, and an upper electrode. The laser element emits laser light in a direction perpendicular to the surface of the substrate when an electric current is supplied between the upper electrode and the lower electrode. The laser element further includes a selective oxidation layer in the upper reflecting mirror having a current blocking structure made of an oxidized region and an unoxidized region, and a detectable portion formed on a side surface of a mesa structure shaped by the upper reflecting mirror including the selective oxidation layer and the active layer, thereby enabling detecting the position of the selective oxidation layer from a top of the laminated body in a depth direction of the laminated body.
摘要:
The present invention provides a process for producing inexpensively and effectively a stamper utilized for producing multi-valued ROM discs, which comprises: (i) irradiating a light onto a laminate, thereby producing reacted portions within a thermo reactive layer, (ii) maintaining the reacted portions, which are produced by irradiating the light, within the thermo reactive layer, (iii) maintaining an optical absorption layer under the reacted portions, (iv) maintaining a substrate under the reacted portions, and (v) removing the maintained optical absorption layer and the maintained thermo reactive layer, wherein the laminate comprises the optical absorption layer and the thermo reactive layer on the substrate, the optical absorption layer and the thermo reactive layer are disposed adjacently.
摘要:
An optical information recording medium having a substrate, a first dielectric layer provided on the substrate, a recording layer provided on the first dielectric layer, a second dielectric layer provided on the recording layer, a light reflection and heat dissipation layer provided on the light reflection and heat dissipation layer, and a crystallization accelerating layer provided in contact with at least a portion of the recording layer and made of a material including a substance selected from Bi, Bi-containing compounds, Al, Al-containing compounds, In, In-containing compounds, Tl and Tl-containing compounds.