摘要:
A semiconductor wafer manufacturing method comprising the steps of preparing a first semiconductor wafer having a plurality of cuts formed at edge portions in crystal directions, preparing a second semiconductor wafer having a cut formed at an edge portion in a crystal direction that is different from the crystal direction of one of said plurality of cuts of said first semiconductor wafer, bonding said first and second semiconductor wafers to each other while using said one of said plurality of cuts of said first semiconductor wafer and said cut of said second semiconductor wafer in order to position said first and second semiconductor wafers, with another one of said plurality of cuts of said first semiconductor wafer being engaged with a guide portion of a semiconductor wafer manufacturing apparatus, thinning said first semiconductor wafer, implanting oxygen ions from said first semiconductor wafer side into a neighborhood of a part where said first and second semiconductor wafers are bonded to each other, and forming the portion implanted with the oxygen ions into an oxide film layer by a thermal treatment.
摘要:
Provided are a thin-film transistor formed by connecting polysilicon layers having different conductivity types with each other which prevents occurrence of inconvenience resulting from diffusion of impurities and a method of fabricating the same.A drain (6), a channel (7) and a source (8) are integrally formed on a surface of a second oxide film (4) by polysilicon. The drain (6) is formed to be connected with a pad layer (3) (second polycrystalline semiconductor layer) through a contact hole (5) which is formed to reach an upper surface of the pad layer (3). The pad layer (3) positioned on a bottom portion of the contact hole (5) (opening) is provided with a boron implantation region BR.
摘要:
In formation of a source/drain region of an NMOS transistor, a gate-directional extension region of an N+ block region in an N+ block resist film prevents a well region located under the gate-directional extension region from implantation of an N-type impurity. A high resistance forming region, which is the well region having a possibility for implantation of an N-type impurity on a longitudinal extension of a gate electrode , can be formed as a high resistance forming region narrower than a conventional high resistance forming region . Thus, a semiconductor device having a partially isolated body fixed SOI structure capable of reducing body resistance and a method of manufacturing the same are obtained.
摘要:
A semiconductor wafer and its manufacturing method are provided where the current driving capability of a MOS transistor can be sufficiently enhanced. An SOI layer wafer in which an SOI layer (32) is formed has a crystal direction notch (32a) and a crystal direction notch (32b). The SOI layer wafer and a supporting substrate wafer (1) are bonded to each other in such a way that the notch (32a) and a crystal direction notch (1a) of the supporting substrate wafer (1) coincide with each other. When bonding the two wafers by using the notch (32a) and the notch (1a) to position the two wafers, the other notch (32b) of the SOI layer wafer can be engaged with a guide member of the semiconductor wafer manufacturing apparatus to prevent positioning error due to relative turn between the wafers. Thus an MOS transistor with a sufficiently improved current driving capability can be fabricated on the semiconductor wafer with the two wafers positioned in crystal directions shifted from each other.
摘要:
An isolation insulating film (5) of partial-trench type is selectively formed in an upper surface of a silicon layer (4). A power supply line (21) is formed above the isolation insulating film (5). Below the power supply line (21), a complete isolation portion (23) reaching an upper surface of an insulating film (3) is formed in the isolation insulating film (5). In other words, a semiconductor device comprises a complete-isolation insulating film which is so formed as to extend from the upper surface of the silicon layer (4) and reach the upper surface of insulating film (3) below the power supply line (21). With this structure, it is possible to obtain the semiconductor device capable of suppressing variation in potential of a body region caused by variation in potential of the power supply line.
摘要:
It is an object to obtain a semiconductor device having such a structure that respective electrical characteristics of an insulated gate type transistor and an insulated gate type capacitance are not deteriorated and a method of manufacturing the semiconductor device. An NMOS transistor Q1 and a PMOS transistor Q2 which are formed in an NMOS formation region A1 and a PMOS formation region A2 respectively have P− pocket regions 17 and N− pocket regions 27 in vicinal regions of extension portions 14e and 24e of N+ source-drain regions 14 and P+ source-drain regions 24, respectively. On the other hand, an N-type variable capacitance C1 and a P-type variable capacitance C2 which are formed in an N-type variable capacitance formation region A3 and a P-type variable capacitance formation region A4 respectively do not have a region of a reverse conductivity type which is adjacent to extraction electrode regions corresponding to the P− pocket regions 17 and the N− pocket regions 27.
摘要:
It is an object to obtain a semiconductor device having such a structure that respective electrical characteristics of an insulated gate type transistor and an insulated gate type capacitance are not deteriorated and a method of manufacturing the semiconductor device. An NMOS transistor Q1 and a PMOS transistor Q2 which are formed in an NMOS formation region A1 and a PMOS formation region A2 respectively have P− pocket regions 17 and N− pocket regions 27 in vicinal regions of extension portions 14e and 24e of N+ source-drain regions 14 and P+ source-drain regions 24, respectively. On the other hand, an N-type variable capacitance C1 and a P-type variable capacitance C2 which are formed in an N-type variable capacitance formation region A3 and a P-type variable capacitance formation region A4 respectively do not have a region of a reverse conductivity type which is adjacent to extraction electrode regions corresponding to the P− pocket regions 17 and the N− pocket regions 27.
摘要:
The present invention provides a method of fabricating a semiconductor device in which deterioration in a transistor characteristic is prevented by preventing a channel stop implantation layer from being formed in an active region. A resist mask is formed so as to have an opening over a region in which a PMOS transistor is formed. Channel stop implantation is performed with energy by which ions pass through a partial isolation oxide film and a peak of an impurity profile is generated in an SOI layer, thereby forming a channel stop layer in the SOI layer under the partial isolation oxide film, that is, an isolation region. An impurity to be implanted here is an N-type impurity. In the case of using phosphorus, its implantation energy is set to, for example, 60 to 120 keV, and the density of the channel stop layer is set to 1×1017 to 1×1019/cm3. At this time, the impurity of channel stop implantation is not stopped in the SOI layer corresponding to the active region.
摘要:
The semiconductor device has a silicon layer (SOI layer) (12) formed through a silicon oxide film (11) on a support substrate (10). A transistor (T1) is formed in the SOI layer (12). The wiring (17a) is connected with a source of the transistor (T1) through a contact plug (15a). A back metal (18) is formed on an under surface (back surface) of the support substrate (10) and said back metal (18) is connected with the wiring (17a) through a heat radiating plug (16). The contact plug (15a), the heat radiating plug (16) the wiring (17a) and the back metal (18) is made of a metal such as aluminum, tungsten and so on which has a higher thermal conductivity than that of the silicon oxide film (11) and the support substrate (10).
摘要:
The invention relates to improvements in a method of manufacturing a semiconductor device in which deterioration in a transistor characteristic is avoided by preventing a channel stop implantation layer from being formed in an active region. After patterning a nitride film (22), the thickness of an SOI layer 3 is measured (S2) and, by using the result of measurement, etching conditions (etching time and the like) for SOI layer 3 are determined (S3). To measure the thickness of SOI layer 3, it is sufficient to use spectroscopic ellipsometry which irradiates the surface of a substance with linearly polarized light and observes elliptically polarized light reflected by the surface of a substance. The etching condition determined is used and a trench TR2 is formed by using patterned nitride film 22 as an etching mask (S4).