摘要:
A process for forming a short channel trench MOSFET. The process includes forming a first implant at the bottom of a trench that is formed in the body of the trench MOSFET and forming a second or angled implant that is tilted in its orientation and directed perpendicular to the trench that is formed in the body of the trench MOSFET. The second implant is adjusted so that it does not reach the bottom of the trench. In one embodiment the angled implant is n-type material.
摘要:
Disclosed is a shallow trench isolation structure having an air gap for suppressing the dark currents and cross-talk which occur in CMOS image sensors. The shallow trench isolation structure suppresses photons injected from neighboring pixels and dark current, so that high-quality images are obtained. Since impurities are removed from a p type ion implantation region for a photodiode when an inner wall oxide layer is etched to form the air gap, the p type ion implantation region has a uniform doping profile, thereby suppressing the diffusion of electrons towards the surface and achieving an image having a high quality.
摘要:
A method is proposed for manufacturing an integrated electronic device (500). The method includes the steps of providing an SOI substrate (505) including a semiconductor substrate (510), an insulating layer (515) on the semiconductor substrate, and a semiconductor starting layer (512) on the insulating layer, the substrate and the starting layer being of a first type of conductivity, performing an epitaxial growing process, the epitaxial growing process being applied to the starting layer to obtain a thicker semiconductor active layer (542) of the first type of conductivity embedding the starting layer on the insulating layer, forming at least one insulating trench (558) extending from an exposed surface of the active layer to the insulating layer, the at least one insulating trench partitioning the active layer into insulated regions (560) and at least one further insulated region (561), and integrating components (580) of the device in the insulated regions, the components being insulated from the substrate by the insulating layer; in the solution according to an embodiment of the invention, the method further includes, before the step of performing an epitaxial growing process, forming at least one contact trench (520) extending from an exposed surface of the starting layer to the substrate in correspondence to each further insulated region, each contact trench clearing a corresponding portion (530b,530s) of the starting layer, of the insulating layer and of the substrate, implanting dopants of a second type of conductivity different from the first type into at least part of the cleared portions, wherein the epitaxial growing is further applied to the cleared portions thereby at least partially filling each contact trench with semiconductor material, the dopants diffusing during the epitaxial growing to form an insulating region (545) of the second type of conductivity enclosing the at least one contact trench of each further insulated region, and integrating further components (580) of the device in each further insulated region, the further components being insulated from the substrate by a junction formed by the corresponding insulating region with the active layer and/or the substrate when reverse-biased.
摘要:
A semiconductor device (1700), which comprises a workpiece (1201) with an outline (1711) and a plurality of contact pads (1205) and further an external part (1701) with a plurality of terminal pads (1702). This part is spaced from the workpiece, and the terminal pads are aligned with the workpiece contact pads, respectively. A reflow element (1203) interconnects each of the contact pads with its respective terminal pad. Thermoplastic material (1204) fills the space between the workpiece and the part; this material adheres to the workpiece, the part and the reflow elements. Further, the material has an outline (1711) substantially in line with the outline of the workpiece, and fills the space (1707) substantially without voids. Due to the thermoplastic character of the filling material, the finished device can be reworked, when the temperature range for reflowing the reflow elements is reached.
摘要:
In manufacturing processes of a semiconductor device including a shallow trench element isolation region and an interlayer insulating film of a multilayer structure, it is necessary to repeatedly use CMP, but since the CMP itself is costly, the repeated use of the CMP is a cause to increase the manufacturing cost. As an insulating film for use in a shallow trench (ST) element isolation region and/or a lowermost-layer interlayer insulating film, use is made of an insulating coating film that can be coated by spin coating. The insulating coating film has a composition expressed by ((CH 3 ) n SiO 2-n/2 ) x (SiO 2 ) 1-x (where n=1 to 3 and 0≤x≤1.0) and a film with a different relative permittivity k is formed by selecting heat treatment conditions. The STI element isolation region can be formed by modifying the insulating coating film completely to a SiO 2 film, while the interlayer insulating film with a small relative permittivity k can be formed by converting it to a state not completely modified.
摘要:
A starting substrate in the form of a semiconductor wafer (1) has a first side and a second side, the sides being plane-parallel with respect to each other, and has a thickness rendering it suitable for processing without significant risk of being damaged, for the fabrication of combined analogue and digital designs, the wafer including at least two partitions (A1, A2; DIGITAL, ANALOGUE) electrically insulated from each other by insulating material (2; 38; 81; L) extending entirely through the wafer. A method for making such substrates including etching trenches in a wafer, and filling trenches with insulating material is also described.
摘要:
In one embodiment, semiconductor device 10 comprises a diode which uses isolation regions (34, 16, and 13) and a plurality of dopant concentrations (30, 20, 24, and 26) which may be used to limit the parasitic current that is injected into the semiconductor substrate (12). Various biases on the isolation regions (34, 16, and 13) may be used to affect the behavior of semiconductor device (10). In addition, a conductive layer (28) may be formed overlying the junction between anode (42) and cathode (40). This conductive layer (28) may decrease the electric field in selected regions in order to increase the maximum voltage that may be applied to cathode (40).