摘要:
The temperature of the front heater is set to a higher value than the set temperature of the center heater and the temperature of the rear heater is set to a lower value than the set temperature of the center heater to thereby provide such a temperature gradient that the temperature of a center heater region gradually rises from the rear side toward the front side and the impurity diffusion is accelerated under the temperature gradient, whereby it is possible to compensate for the decrease in the quantity of the diffused impurity caused by the lowering of the impurity concentration of the impurity gas gradually from the rear side toward the front side, so that the impurity is uniformly diffused into the wafers located in the core pipe.
摘要:
A simplified method of manufacturing a semiconductor device is disclosed wherein a base region is formed on a silicon substrate and an impurity is diffused into the base region. Any insulating film present on the silcon substrate is removed, substrate and an even film of silicon dioxide is coated thereon. Emitter diffusion windows, base electrode windows, collector electrode windows and resistor electrode windows are formed in the silicon dioxide film and a uniform film of polycrystal silicon is deposited over the silicon dioxide film and the electrode windows. Impurities are diffused through the polycrystal silicon film at the emitter and collector windows but not through the base window. An aluminum electrode layer is formed on the polycrystal silicon layer and patterned to form an electrode wiring pattern. Subsequently, the polysilicon layer is removed in exposed areas utilizing the aluminum electrode layer as a mask.
摘要:
A multiple transistor consists of vertical and lateral transistors, the collector region of the lateral transistor is formed by diffusion within the diffused base region of the vertical transistor simultaneously with the emitter region of the vertical transistor, into a structure in which the base of the vertical transistor and the collector of the lateral transistor are short-circuited. As a result the current gain of the lateral transistor can be varied by changing the area of the collector region.
摘要:
The invention relates to a semiconductor device having a substrate of the one conductivity type on which an epitaxial layer divided into islands of the opposite conductivity type is provided and in which at least one island comprises a lateral transistor and a buried layer of the opposite conductivity type. In order to obtain both a small vertical emitter injection and a high collector-base breakdown voltage, the emitter zone has a larger thickness than the collector zone and, in contrast with the collector zone, the emitter zone reaches up to the buried layer. No additional manufacturing step is necessary for the manufacture.
摘要:
A semiconductor integrated circuit device is disclosed which comprises a bipolar transistor and a field effect transistor, in which a gate electrode of the field effect transistor and a collector electrode of the bipolar transistor are formed from a common electrode layer of a high impurity concentration, and in which the collector region of the bipolar transistor comprises a region of a high impurity concentration having a conductivity type the same as that of the collector region of the bipolar transistor.
摘要:
The present invention relates to a semiconductor device and a method of producing the same. According to this method, a lower diffusion layer of a double isolation diffusion area is attached to a surface of a substrate, an epitaxial layer being formed on the lower diffusion layer, the lower diffusion layer being largely outdiffused upwardly in the epitaxial layer and simultaneously an element diffusion area being deeply diffused from a surface of the epitaxial layer, and then an upper diffusion layer of the double isolation diffusion area being shallowly diffused from the surface of the epitaxial layer. Thus, the lateral expansion of the upper diffusion layer of the double isolation diffusion area can be suppressed and the integrated extent can be improved. On the other hand, in a semiconductor device of the present invention, the above described double isolation diffusion area is formed and a collector area, a base area and an emitter area are formed all over the width of the epitaxial layer (the base area and the emitter area are formed by a double diffusion). In addition, it includes a vertical type transistor whose fluctuation of a width of the base area is reduced, so that the transition frequency f.sub.T and current gain h.sub.FE of this transistor are increased.
摘要:
During the manufacture of an I.sup.2 L device, to achieve diffusion steps for a collector region and a collar region at the same time, polycrystal silicon is deposited over the whole surface of the collector region and then an impurity is diffused simultaneously into the collector region and the collar region.
摘要:
A monolithic storage matrix having cells formed of multi-emitter transistors in which one emitter of each transistor forms part of the storage circuit and the other emitter of each transistor is coupled to the accessing and retrieval circuits. The transistors portions for storage are formed with bases of a given width and the transistors portions coupled to the accessing and retrieving circuits have a lesser width so that short access times are obtained while the stability of the storage circuit is maintained.
摘要:
A method of manufacturing a semiconductor integrated circuit in which a P type semiconductor layer is epitaxially grown in the surface of a P type semiconductor substrate containing N buried layers therein, the P type layer is divided into a plurality of electrically isolated portions by N type regions which are formed by diffusing a donor impurity into the surface of said P type semiconductor layer towards the N type buried layers, the divided P type semiconductor portions forming individually diodes and transistors with the N type regions connected to said buried layers as their structural elements.
摘要翻译:一种制造半导体集成电路的方法,其中P型半导体层在其中包含N +掩埋层的P型半导体衬底的表面中外延生长,P型层被分成多个电隔离部分 N +型区域,其通过将施主杂质扩散到所述P型半导体层的表面朝向N +型掩埋层而形成,分割的P型半导体部分分别形成二极管和具有N + 连接到所述埋层的类型区域作为其结构元件。
摘要:
The method of the present invention introduces a method of forming conductively doped contacts on a supporting substrate in a semiconductor device that minimizes the lateral out-diffusion of the conductive dopants and also provides for a low resistive contact by the steps of: preparing a conductive area to accept contact formation; forming a phosphorus insitu doped polysilicon layer over the conductive area; forming an arsenic insitu doped polysilicon layer over the phosphorus insitu doped polysilicon layer, wherein the two insitu doped polysilicon layers are deposited one after another in separate deposition steps; and annealing the layers at a temperature range of approximately 900.degree.-1100.degree. C. thereby, resulting in sufficient thermal treatment to allow phosphorus atoms to break up a first interfacial silicon dioxide layer formed between the conductive area and the phosphorus insitu doped polysilicon layer.