Abstract:
In a semiconductor device, an impurity diffused layer serving as an active region is formed in a predetermined region of the surface of a semiconductor substrate of silicon, an underlayer insulating film is formed on the semiconductor substrate for the purpose of protecting and stabilizing the surface of the semiconductor substrate, and an interconnection electrically connected to the impurity diffused layer through a contact hole and formed on an Al-Si-Sn alloy, an Al-Si-Sb alloy or alloys having Ti added to the respective alloys, so that occurrence of an alloy pit and a silicon nodule is prevented. In addition, a completed protective film is formed on the interconnection and the underlayer insulating film and an aperture in a bonding pad region is formed in a predetermined region of the completed protective film, so that the interconnection and the bonding pad are electrically connected to each other. The proportion of silicon and other materials in the alloy are controlled to simultaneously avoid alloy pit and silicon nodule defects both at the contact hole and throughout the alloy conductor.
Abstract:
A first transparent protection layer is formed on color filters, and micro lenses are further formed on the first transparent protection layer. Then unevenness due to the micro lenses is flattened by a first transparent resin layer which has water repellency and oil repellency (low surface energy), a high transmittance in visible light range, a high flattening capability in a coating process, and a refractive index lower than the refractive index of the micro lenses. With the above-mentioned arrangement, dust or the like can be difficult to contaminate the surface of the solid state image sensor without loosing the light converging effect of the micro lenses. Even when dust or the like attaches to the surface, it can be easily removed with a cotton swab or the like.
Abstract:
The present invention provides a sub-mount type device for emitting light which has high speed response and yet can radiate heat sufficiently. The sub-mount type device for emitting light comprises a heat sink (4), a sub-mount body (62) mounted on the heat sink (4) which comprises an insulating layer (38) with a upper face and a lower face, a upper electrode (42) on the upper face and a lower electrode 44 and 36 on the lower face, the insulating layer having two parts of the insulating layer (38) thickness of which is different, and a chip (30) for emitting light above the thinner part (39) of the insulating layer (38).
Abstract:
A MOS-FET transistor is produced on a substrate made of glass which has a non single crystal semiconductor film (2'). The average diameter of a crystal grain in said film is in the range between 0.5 times and 4 times of thickness of said film, and said average diameter is 250 .ANG.-8000 .ANG., and said film thickness is 500 .ANG.-2000 .ANG.. The density of oxygen in the semiconductor film (2') is less than 2.times.10.sup.19 /cm.sup.3. A photo sensor having PIN structure is also produced on the substrate, to provide an image sensor for a facsimile transmitter together with the transistors. Said film (2') is produced by placing amorphous silicon film on the glass substrate through CVD process using disilane gas, and effecting solid phase growth to said amorphous silicon film by heating the substrate together with said film in nitrogen gas atmosphere. The film (2') thus produced is subject to implantation of dopant for providing a transistor. The film thus produced has high mobility which provides high speed operation of a transistor, and low threshold voltage of a transistor.
Abstract:
A dielectrics dividing wafer is disclosed in which embedded dielectric films are provided in the interior of the wafer in a predetermined pattern extending laterally parallel to a face surface of the wafer, and partition dielectric films, in the form of vertical walls extending from the face surface and the rear surface of the wafer, to the embedded dielectric films, are provided to define semiconductor areas extending continuously from the face surface of the wafer to the rear surface of the wafer. The semiconductor areas can be used for vertical circuit elements. The partition dielectric films in conjunction with the embedded dielectric films and the face surface of the wafer also define additional planar semiconductor areas that can be used for planar structure circuit elements.
Abstract:
A long-life, electrically writable and erasable non-volatile semiconductor memory device is disclosed. The memory device is fabricated in the following steps. After forming a first gate insulating film on a semiconductor substrate, a window is opened in the first gate insulating film to expose a portion of the surface of the semiconductor substrate, using a two-step etching technique in which dry etching and wet etching are performed successively. The exposed portion of the semiconductor substrate not over-etched is selectively oxidized to form a tunnel insulating film (second gate insulating film) having edge portions resistant to dielectric breakdown. Thereafter, a floating gate, a third gate insulating film, and a control gate are formed sequentially. The floating gate is patterned in such a way as to cover the entire tunnel insulating film or cross only a portion of an edge of the tunnel insulating film. The stress caused to the tunnel insulating film as a result of the oxidation process for forming the third gate insulating film is relieved, providing the tunnel insulating film with resistance to dielectric strength.
Abstract:
A semiconductor device having a superior step coverage of a layer formed inside or near a contact-hole is provided. An intermediate conductive layer is formed through an insulating layer on a lower conductive layer on a semiconductor substrate, and first, second and third inter-layer insulating layers are formed on the intermediate conductive layer. The third inter-layer insulating layer is selectively removed by an isotropic wet etching method thereby to form a through-hole extended to the second inter-layer insulating layer and having a large opening area. In performing this, the second inter-layer insulating layer acts to restrict the removal of the third inter-layer insulating layer in the thickness direction. Next, the first and second inter-layer insulating layers are selectively removed by an anisotropic dry etching method thereby to form a through-hole having a small opening area. The through-hole having a large opening area and the through-hole having a small opening area form a contact-hole. Subsequently, an upper conductive layer is formed on the third inter-layer insulating layer so as to be electrically connected to the lower conductive layer through the contact-hole.
Abstract:
An amorphous silicon antifuse has a bottom electrode, a dielectric overlying the bottom electrode, amorphous silicon contacting the bottom electrode in a via in the dielectric, and the top electrode over the amorphous silicon. Spacers are provided in the via corners between the amorphous silicon and the top electrode. The spacers smooth the surface above the amorphous silicon, provide good top electrode step coverage, and reduce leakage current. Another amorphous silicon antifuse is provided in which the amorphous silicon layer is planar. The planarity makes the amorphous silicon layer easy to manufacture. A programmable CMOS circuit is provided in which the antifuses are formed over the intermetal dielectric. The antifuses are not affected by the high temperatures associated with the formation of the intermetal dielectric and the first-metal contacts. The intermetal dielectric protects the circuit elements during the antifuse formation. The bottom electrodes of the antifuses are connected to the first-metal contacts. The overall capacitance associated with the antifuses is low, and hence the circuit is fast.
Abstract:
A semiconductor Nonvolatile memory. The memory cell has the following structure. Within a P type silicon substrate 3, there are provided an n.sup.+ type source 26 and an n.sup.+ type drain 28, the two regions forming a channel region 30. On top of the channel region 30 there are laminated a silicon dioxide film 5, an insulating layer which consists of the nitride film 18a,18b and 18c, and the oxide film 20a,20b and 20c. Further, on top of the insulating layer, there is formed a polysilicon film 24, which serves as a control electrode. By using the memory cell and row select transistor a semiconductor nonvolatile memory can be constructed.
Abstract:
Disclosed is a flash EEPROM cell needing only a 5 volt external source using an on-chip voltage multiplier circuit to provide high voltages necessary to effect Fowler-Nordheim tunneling during both the program and erase modes. Properties of dielectric layers between a floating gate and a control gate and between the floating gate and a drain region differ to facilitate programming and erasing of the floating gate. Also disclosed is a method for producing a flash EEPROM cell by forming the insulative layer between a floating gate and a control gate to have a capacitance lower than the capacitance of the insulating layer between the floating gate and a drain region.