摘要:
A method of manufacturing a semiconductor device has forming process for forming a semiconductor device on a major surface of a wafer, and testing process for testing defect of the semiconductor device formed on the wafer. The testing process includes a step bringing a testing apparatus into contact with test electrodes of the semiconductor device. The testing apparatus has a contactor including a plurality of probes that come into contact with the test electrodes of the semiconductor device to be tested, and secondary electrodes electrically connected to the probes and disposed on a surface opposite to the probes; a substrate on which electrodes electrically communicated to the contactor by a conducting device. The conducting device is so formed that stress applied to the conducting device in the state where the probes are in contact with the test electrodes is larger than stress applied to the conducting device in the state where the probes are not in contact with the test electrodes.
摘要:
Gate oxide films, gate electrodes, base regions and emitter regions, which constitute IGBTs, are formed on a semiconductor wafer. A silicon oxide film is formed on the gate electrodes. Further, an emitter electrode is formed thereabove, and a passivation film is formed over the emitter electrode. Thereafter, an internal area of a back surface of the semiconductor wafer is polished to form a protrusion at its outer peripheral portion. Afterwards, an impurity is injected from the back surface of the semiconductor wafer to form a collector region. After a collector electrode is further formed, the semiconductor wafer is mounted on a stage smaller than the internal area and subjected to dicing along scribe areas. Thus, the strength of the semiconductor wafer is held by the protrusion, and cracking or the like of the semiconductor wafer can be reduced owing to the execution of the dicing in the above-described manner.
摘要:
A blow molding method includes steps of moving a split mold to a parison receiving position where a parison is supplied and receiving a parison, closing the split mold, performing blow molding at a blow molding position, and opening the split mold at a product discharge position and thereby discharging a product. The method further includes steps of: sequentially reciprocating each split mold in trains of split molds provided opposed to each other across the parison receiving position to and from a position opposed to the parison receiving position; and sequentially reciprocating the split mold disposed at the position where the split mold is opposed to the parsion receiving position to and from the parison receiving position for performing blow molding. There is also provided a blow molding apparatus for carrying out this molding method.
摘要:
For an inspection tray, a silicon substrate including a beam or a diaphragm, a probe and wiring is used. To highly accurately position a chip to be inspected, a second substrate for alignment is disposed on the substrate. To position the probe having wiring disposed on the first substrate and the electrode pad of the chip to be inspected, a projection or a groove is formed in each of both substrates. Preferably, the projection or groove should be formed by silicon anisotorpic etching to have a (111) crystal surface. As another machining method, dry etching can be used for machining the positioning projection or groove. By using an inductively coupled plasma-reactive ion etching (ICP-RIE) device for the dry etching, a vertical column or groove can be easily machined.
摘要:
A semiconductor device capable of operating at a high speed or of having many functions. In this device, delamination of buried electrodes is prevented and thus high reliability is offered. The depth A of contact holes, the minimum linewidth R of a lower metallization layer, and the thickness B of the lower metallization layer satisfy relations given by (0.605/R)0.5
摘要:
A semiconductor device has a gate dielectric film formed of zirconium oxide or hafnium oxide as a chief material and a gate electrode film in contact with the gate dielectric film on one principal surface side of a silicon substrate. The gate dielectric film contains an addition element to prevent diffusion of oxygen.
摘要:
In forming an electrode 2 on a silicon oxide film 5 on a semiconductor substrate 4 through a silicon oxide film 5, for example, the gate electrode 2 is structured in a laminated structure of a plurality of polycrystalline silicon layers 6. The portion of the gate electrode 2 is formed by a method of manufacturing a thin film having a process of depositing amorphous layers and a process of crystallizing (recrystallizing) this amorphous material. In this case, depositing of the amorphous layers is carried out dividedly by a plurality of times so that the thickness of an amorphous layer to be deposited at one time is not larger than a thickness to be prescribed by a critical stress value determined according to a fail event, the amorphous material is crystallized after each process of depositing each amorphous layer has been finished, and the process of depositing amorphous layers and the process of crystallizing the amorphous material are repeated, whereby a laminated structure of the polycrystalline layer 6 having a necessary film thickness is obtained. With the above-described arrangement, it is possible to prevent a deterioration of electric characteristics of a semiconductor device and an occurrence of a defect, such as a peeling off between layers, cracks in a layer, etc., and it is possible to obtain a polycrystalline layer of small grain size in a desired film thickness by a lamination of polycrystalline materials.
摘要:
A semiconductor device capable of operating at a high speed or of having many functions. In this device, delamination of buried electrodes is prevented and thus high reliability is offered. The depth A of contact holes, the minimum linewidth R of a lower metallization layer, and the thickness B of the lower metallization layer satisfy relations given by (0.605/R)0.5
摘要:
A silicon oxide film 2 which is exposed from a side wall of a groove 4a is etched to displace the silicon oxide film 2 backward toward an active region. The displacement amount is set to be equal to or more than a film thickness (Tr) of a silicon oxide film 5 to be formed on an inner wall of the groove 4a in a later thermal oxidation step and equal to or less than twice the film thickness (Tr) thereof. A shoulder portion of the groove 4a can be rounded by a low-temperature heat treatment at 1000.degree. C. or less, by controlling a heat treatment period such that the film thickness (Tr) of the silicon oxide film 5 is more than the film thickness (Tp) of the silicon oxide film 2 and equal to or less than three times the film thickness (Tr) thereof (Tp