Abstract:
A semiconductor device includes an internal circuit area including a plurality of I/O modules, and a peripheral area receiving therein a pair of loop test lines for testing I/O buffers in the I/O modules. The internal test line extending from each of the loop test lines toward the internal circuit area includes an out-module test line formed as the topmost layer, a first in-module test line formed as the topmost layer and connected to the out-module test line, and a second in-module test line, a portion of which is formed by connecting the in-buffer test lines together.
Abstract:
A gradation selector circuit provided with a resistor string circuit in which resistive elements are connected in series between a high potential power source and a low potential power source and a selector circuit which is connected to the resistor string circuit, which selects one of plural analog voltages generated in the resistor string circuit according to a control signal and which outputs it to an output terminal is used. The selector circuit includes analog switching circuits that select analog voltage close to intermediate potential. The analog switching circuit includes a P-type MOS transistor to the source electrode and the back gate electrode of which the resistor string circuit is connected and a depletion type N-type MOS transistor to the source electrode of which the drain electrode of the P-type MOS transistor is connected and to the drain electrode of which an output terminal is connected.
Abstract:
A system is provided for maintaining plural different process flows for manufacturing different kinds of semiconductor device respectively on a semiconductor production line. The plural different process flows are registered in an automatic process control system. The system includes a function unit for setting an automatic process control in the automatic process control system based on an automatic process control information for each of the plural different process. The automatic control information for each of the plural different process flows further includes a process flow name, and process names respectively unique to the single process flow.
Abstract:
An SOI (Silicon On Insulator) wafer which has a BOX (Buried Oxide) layer and an SOI layer formed on a silicon substrate is prepared. A silicon oxide film and a silicon nitride film are deposited and patterned on the surface of the SOI layer. Then, with the silicon oxide film and silicon nitride film used as masks, dry etching is performed to form trenches, which do not reach the BOX layer, in the SOI layer. Next, round oxidation is executed by performing thermal oxidation on the SOI wafer, thereby forming a silicon oxide film in that region of the SOI layer which corresponds to the bottom and sides of each trench. Then, with a photoresist as a mask, the SOI layer which is located at the bottoms of the trenches is selectively etched out to form trenches which reach the BOX layer. Then, an STI (Shallow Trench Isolation) region is formed in those trenches.
Abstract:
The present invention discloses a production apparatus for manufacturing semiconductor device which comprises a vacuum processing chamber where film formation or etching is performed for a semiconductor wafer, a gas introducing part for introducing a process gas into the vacuum processing chamber, and a shower head for uniformly diffusing the introduced process gas, where a plate having a plurality of gas blowing holes for blowing the process gas on the semiconductor wafer are arranged and opened with uniform density is provided on the face of a shower head opposing the semiconductor wafer. Each of the gas blowing holes opened in the plate is a steeped hole having a large diameter hole part and a small diameter hole part, formed by varying the step location in response to the pressure distribution of the process gas within the shower head so as to make the amount of the gas blown from respective gas blowing holes uniform.
Abstract:
An automatic generation method of dummy patterns of the present invention includes: a first step of preparing a plurality of dummy pattern components which have regularly arranged dummy patterns, respectively, and for which priorities are set based upon a predetermined rule; a second step of selecting one of the plurality of dummy pattern components and arranging dummy patterns belonging to the selected dummy pattern component to overlap layout data of mask patterns for which arrangement prohibition regions are set; a third step of deleting dummy patterns which are in contact with or overlap the arrangement prohibition regions among the arranged dummy patterns; and a fourth step of deleting dummy patterns belonging to the dummy pattern component with a lower priority in the case in which a plurality of dummy patterns are in contact with or overlap each other.
Abstract:
There is provided a power supply voltage fluctuation analyzing method which performs power supply voltage fluctuation analysis for a semiconductor product, and the method comprises a step of determining a power consumption distribution in each function cell of the semiconductor product by using a power supply portion position and a ratio of each portion based on stored information of an input library which stores therein the power supply portion position and ratio information for each function cell of the semiconductor product, and allocating a power consumption to each function cell.
Abstract:
A semiconductor capacitor configured so as to use buried wirings, as electrodes, formed in an interlayer dielectric is provided on a semiconductor substrate which is capable of preventing an increase in a number of manufacturing processes with occurrence of parasitic capacity being suppressed. The semiconductor capacitor has a capacitive insulating film made up of an etching stopper film formed only in a region being sandwiched between a via plug serving as an upper electrode and a lower electrode, in which the capacitive insulating film is not formed in a region other than the facing region.
Abstract:
Disclosed is a method for correcting a transistor of a predetermined threshold value. According to the method, after preparing a gate 13 of the transistor, depending on how well the gate is prepared, a threshold voltage Vth showing transistor characteristic is corrected by adjusting an oxygen concentration of a lamp-annealing step 21, which is to be performed subsequently. Moreover, disclosed is a method for fabricating a transistor of a predetermined threshold value. According to the method, after preparing the gate 13 of the transistor, the threshold voltage Vth showing the transistor characteristic is predicted or measured. When the threshold voltage deviates from the predetermined value, the oxygen concentration is adjusted in the lamp-annealing step 21 of the transistor that is to be fabricated subsequently and thus the threshold value is set to the predetermined value without lowered reliability due to the damage of the gate oxide film and without additional process steps.
Abstract:
A via hole 18 is opened in an interlayer insulating film 17, which covers a lower layer interconnect 12, a protective film 19 is embedded on the base portion of the via hole 18, and a soluble resin 20, which dissolves in a resist developing fluid under unexposed conditions, is further embedded thereupon. On this basis, a photoresist 21 is applied, and this photoresist 21 is subjected to an exposure and a development process so as to form a resist pattern 21a, which has an aperture window in a region including the via hole. Upon formation of an interconnective trench in the interlayer insulating film 17 utilizing the resist pattern 21a, a dual damascene structure is formed by embedding a metallic material into the vial hole and interconnective trench.