WO2017056355A1 - 半導体装置、超音波撮像装置、半導体装置の製造方法及び超音波イメージングシステム - Google Patents
半導体装置、超音波撮像装置、半導体装置の製造方法及び超音波イメージングシステム Download PDFInfo
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- WO2017056355A1 WO2017056355A1 PCT/JP2016/003366 JP2016003366W WO2017056355A1 WO 2017056355 A1 WO2017056355 A1 WO 2017056355A1 JP 2016003366 W JP2016003366 W JP 2016003366W WO 2017056355 A1 WO2017056355 A1 WO 2017056355A1
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- semiconductor device
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- silicon
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Definitions
- the present technology relates to a semiconductor device including an integrated circuit including a protection circuit, an ultrasonic imaging device, a semiconductor device manufacturing method, and an ultrasonic imaging system.
- an ultrasonic image can be generated by irradiating a measurement object from an ultrasonic transducer and detecting the reflected wave generated in the measurement object with the ultrasonic transducer. It is used as an endoscope and an ultrasonic catheter.
- the drive voltage applied to the ultrasonic transducer to oscillate the ultrasonic wave and the signal voltage generated by the ultrasonic transducer upon detection of the ultrasonic wave are greatly different.
- the drive voltage is about several hundreds V at the maximum.
- the signal voltage is about several ⁇ V.
- an amplifier circuit for amplifying the signal voltage is used.
- the amplifier circuit fails. Therefore, a protection circuit that prevents the drive voltage from reaching the amplifier circuit is also required. If these circuits can be mounted on one semiconductor substrate, the mounting space can be saved.
- an SOI (silicon on insulator) substrate is excellent in voltage resistance and is suitable as a semiconductor substrate having both an amplifier circuit and a protection circuit.
- Patent Document 1 discloses a semiconductor device in which an amplifier circuit and a protection circuit are mounted on one SOI substrate.
- an amplifier circuit is formed on an SOI substrate, and a protection circuit is formed in a through hole provided in the SOI substrate.
- the protection circuit is made of polysilicon embedded in the through hole.
- polysilicon generally has a high resistance, and there is a problem that it is difficult to form a diode having good leakage current characteristics due to defects in the polysilicon.
- An SOI substrate generally has a thickness of about 0.8 mm, but it is difficult to form a through hole with a width of several tens of ⁇ m in the SOI substrate in terms of the manufacturing process. If the width of the through hole is increased to reduce the aspect ratio (opening / depth), it is difficult to reduce the element area.
- an object of the present technology is to provide a semiconductor device, an ultrasonic imaging device, a manufacturing method of the semiconductor device, and an ultrasonic imaging system including a protection circuit having a small area and good characteristics. is there.
- a semiconductor device includes a silicon substrate made of crystalline silicon, a BOX (buried oxide) layer stacked on the silicon substrate, and an SOI (silicon on) stacked on the BOX layer.
- a semiconductor device including an integrated circuit which is formed on an SOI substrate including an insulator) layer, and includes a protection circuit and an element isolation region.
- the protection circuit comprises a semiconductor region that constitutes the integrated circuit and has the same crystal orientation as the silicon substrate.
- the element isolation region penetrates the SOI substrate and isolates the protection circuit.
- the protection circuit includes a semiconductor region made of crystalline silicon having the same crystal orientation as the silicon substrate. Crystalline silicon has higher mobility than amorphous silicon such as polysilicon, and can reduce the element area of the protection circuit and ensure good leakage current characteristics.
- the diode may be a protection circuit.
- a TR (transmit-receive) switch can be formed by a diode, and the diode can be used as a protection circuit.
- the protective circuit may be a vertical transistor.
- a TR switch can be formed by a vertical transistor, and the vertical transistor can be used as a protection circuit.
- the element isolation region may be composed of one or more of silicon oxide, silicon nitride, and polysilicon.
- An element isolation region can be formed by forming a silicon oxide film or a silicon nitride film in a through hole provided in an SOI substrate and embedding polysilicon therein.
- the element isolation region may include a gate electrode of the vertical transistor.
- the polysilicon By connecting a wiring to polysilicon buried in the element isolation region, the polysilicon can be used as a gate electrode of a vertical transistor.
- the SOI substrate has a first surface and a second surface opposite to the first surface
- the protection circuit includes a first semiconductor element and a second semiconductor element
- the first semiconductor element includes a first semiconductor region having a first impurity type on the first surface side and a second semiconductor region having a second impurity type on the second surface side.
- a semiconductor region is stacked and configured.
- the second semiconductor element includes a third semiconductor region on the first surface side and having the second impurity type, and a second semiconductor side on the second surface side and having the first impurity type. Four semiconductor regions may be laminated.
- a back-to-back diode can be formed by the first semiconductor element and the second semiconductor element.
- a back-to-back diode is a diode in which two diodes are connected to one P-type semiconductor region and the other N-type semiconductor region, and is frequently used as an element having a Zener diode function in a high-voltage element.
- the semiconductor device may further include a ground contact structure that is provided on the first surface of the semiconductor device and is electrically connected to the first semiconductor region and the third semiconductor region.
- the ground contact structure may be connected to the first semiconductor region and the third semiconductor region, and may include a ground wiring common to both the first semiconductor region and the third semiconductor region.
- first semiconductor region and third semiconductor region of the back-to-back diode have the same potential, both regions can be connected by a common ground wiring.
- the ground contact structure may be connected to the ground wiring and include a ground electrode common to both the first semiconductor region and the third semiconductor region.
- the semiconductor device may further include a signal wiring connected to the second semiconductor region and the fourth semiconductor region, and common to both the second semiconductor region and the fourth semiconductor region.
- both regions can be connected by a common signal wiring.
- an ultrasonic imaging apparatus includes a semiconductor device.
- the semiconductor device is a semiconductor device including an integrated circuit formed on an SOI substrate including a silicon substrate made of crystalline silicon, a BOX layer stacked on the silicon substrate, and an SOI layer stacked on the BOX layer.
- a protection circuit comprising a semiconductor region that constitutes the integrated circuit and has the same crystal orientation as the silicon substrate, and an element isolation region that penetrates the SOI substrate and isolates the protection circuit.
- the semiconductor device can be used as an impedance matching circuit of an ultrasonic transducer included in the ultrasonic imaging apparatus.
- a method for manufacturing a semiconductor device in which an integrated circuit is formed over an SOI substrate includes a silicon substrate made of crystalline silicon, a BOX layer stacked on the silicon substrate, and an SOI stacked on the BOX layer.
- An SOI substrate comprising a layer is prepared.
- a protective circuit constituting the integrated circuit is formed by providing a semiconductor region having the same crystal orientation as the silicon substrate on the silicon substrate.
- An element isolation region that penetrates the SOI substrate and isolates the protection circuit is formed.
- a substrate polishing method may be used in which the silicon substrate is polished from a surface opposite to the surface of the semiconductor region where crystal growth proceeds to expose the semiconductor region.
- An ultrasound imaging system includes an ultrasound catheter.
- the ultrasonic catheter is a semiconductor device including an integrated circuit formed on an SOI substrate including a silicon substrate made of crystalline silicon, a BOX layer stacked on the silicon substrate, and an SOI layer stacked on the BOX layer. And mounting a semiconductor device that constitutes the integrated circuit and includes a protection circuit including a semiconductor region having the same crystal orientation as the silicon substrate, and an element isolation region that penetrates the SOI substrate and isolates the protection circuit. .
- An ultrasound imaging system includes an intraoperative ultrasound probe or an ultrasound endoscope.
- the intraoperative ultrasonic probe or the ultrasonic endoscope is formed on an SOI substrate including a silicon substrate made of crystalline silicon, a BOX layer stacked on the silicon substrate, and an SOI layer stacked on the BOX layer.
- a semiconductor device comprising:
- An ultrasound imaging system includes a hand-held instrument with an ultrasound imaging function used in laparoscopic surgery.
- the hand-held instrument with an ultrasonic imaging function includes an integrated circuit formed on an SOI substrate including a silicon substrate made of crystalline silicon, a BOX layer stacked on the silicon substrate, and an SOI layer stacked on the BOX layer.
- a semiconductor device comprising a protection circuit comprising a semiconductor region that constitutes the integrated circuit and having the same crystal orientation as the silicon substrate, and an element isolation region that penetrates the SOI substrate and isolates the protection circuit Mount the device.
- An ultrasonic imaging system includes robot forceps with an ultrasonic imaging function used in laparoscopic surgery.
- the robot forceps with an ultrasonic imaging function includes an integrated circuit formed on an SOI substrate including a silicon substrate made of crystalline silicon, a BOX layer stacked on the silicon substrate, and an SOI layer stacked on the BOX layer.
- a semiconductor device comprising a protection circuit comprising a semiconductor region that constitutes the integrated circuit and having the same crystal orientation as the silicon substrate, and an element isolation region that penetrates the SOI substrate and isolates the protection circuit Mount the device.
- the present technology it is possible to provide a semiconductor device, an ultrasonic imaging device, a method for manufacturing a semiconductor device, and an ultrasonic imaging system including a protection circuit having a small area and good characteristics.
- the effects described here are not necessarily limited, and may be any of the effects described in the present disclosure.
- FIG. 1 is a cross-sectional view of a semiconductor device according to a first embodiment of the present technology. It is sectional drawing of the partial structure of the same semiconductor device.
- 2 is a cross-sectional view of an SOI substrate used for manufacturing the semiconductor device.
- FIG. 2 is a plan view of an element isolation region of the semiconductor device.
- FIG. It is a schematic diagram which shows the impedance matching circuit using the semiconductor device. It is a schematic diagram which shows the manufacturing method of the same semiconductor device. It is a schematic diagram which shows the manufacturing method of the same semiconductor device. It is a schematic diagram which shows the manufacturing method of the same semiconductor device. It is a schematic diagram which shows the manufacturing method of the same semiconductor device. It is a schematic diagram which shows the manufacturing method of the same semiconductor device. It is a schematic diagram which shows the manufacturing method of the same semiconductor device. It is a schematic diagram which shows the manufacturing method of the same semiconductor device. It is a schematic diagram which shows the manufacturing method of the same semiconductor device.
- IVUS intravascular ultrasound endoscope
- FIG. 1 is a cross-sectional view showing a configuration of the semiconductor device 100 according to the present embodiment
- FIG. 2 is a cross-sectional view showing a partial configuration of the semiconductor device 100.
- the semiconductor device 100 includes an LV (Low Voltage) circuit 110, a first diode 130 and a second diode 150, a silicon substrate 171, a BOX (buried oxide) layer 172, and an element isolation region 173.
- the semiconductor device 100 is an integrated circuit including an LV circuit 110, a first diode 130, and a second diode 150, and the first diode 130 and the second diode 150 constitute a protection circuit for this integrated circuit.
- FIG. 3 is a schematic diagram of an SOI substrate 200 constituting the semiconductor device 100.
- the SOI substrate 200 includes a silicon substrate 201, a BOX layer 202, and an SOI layer 203.
- the silicon substrate 201 is made of P-type crystalline silicon.
- BOX layer 202 are stacked on a silicon substrate 201, made of SiO 2.
- the SOI layer 203 is laminated on the BOX layer 202 and is made of silicon.
- the SOI substrate 200 can be manufactured by a SIMOX (Separation by IMplantation of OXygen) method or a bonding method.
- the semiconductor device 100 is manufactured by subjecting the SOI substrate 200 to a processing process described later.
- the silicon substrate 171 of the semiconductor device 100 is a part of the silicon substrate 201 of the SOI substrate 200, and the BOX layer 172 of the semiconductor device 100 is a part of the BOX layer 202 of the SOI substrate 200.
- the surface on the LV circuit 110 side is referred to as the upper surface 100a, and the opposite surface is referred to as the lower surface 100b.
- the LV circuit 110 includes an N-type semiconductor region 111, a P-type semiconductor region 112, an N ++ type semiconductor region 113, a P ++ type semiconductor region 114, a first gate electrode 115, a second gate electrode 116, a gate insulating film 117, element isolation.
- a layer 118 and a signal wiring 119 are provided.
- the N-type semiconductor region 111 is laminated on the BOX layer 172 and is made of silicon doped with an N-type dopant.
- the N-type dopant is typically phosphorus.
- the P-type semiconductor region 112 is laminated on the BOX layer 172 and is made of silicon doped with a P-type dopant.
- the P-type dopant is typically boron.
- the N-type semiconductor region 111 and the P-type semiconductor region 112 face the upper surface 100a and are separated by an element isolation layer 118 made of SiO 2 .
- the N ++ type semiconductor region 113 is made of silicon doped with a large amount of N type dopant, and is formed at two positions in the P type semiconductor region 112 so as to be separated from each other. Each N ++ type semiconductor region 113 faces the upper surface 100a, and the signal wiring 119 is connected thereto.
- the P ++ type semiconductor region 114 is made of silicon doped with a large amount of P type dopant, and is formed at two locations in the N type semiconductor region 111 so as to be separated from each other. Each P ++ type semiconductor region 114 faces the upper surface 100a, and the signal wiring 119 is connected thereto.
- the first gate electrode 115 is made of a metal such as aluminum or a conductive material such as polysilicon, and is formed on the N-type semiconductor region 111 via the gate insulating film 117.
- the second gate electrode 116 is made of a metal such as aluminum or a conductive material such as polysilicon, and is formed on the P-type semiconductor region 112 via the gate insulating film 117.
- the N-type semiconductor region 111, the P-type semiconductor region 112, the N ++ type semiconductor region 113, and the P ++ type semiconductor region 114 are regions formed by implanting a P-type or N-type dopant into the SOI layer 203 of the SOI substrate 200. is there.
- the element isolation layer 118 is a region formed by oxidizing the SOI layer 203 to SiO 2 .
- the configuration of the LV circuit 110 is not limited to the above, and any configuration that can be manufactured by processing the SOI layer 203 of the SOI substrate 200 may be used.
- the first diode 130 includes an N-type semiconductor region 131, a P-type semiconductor region 132, a P ++ type semiconductor region 133, a ground wiring 134 and a signal wiring 135.
- the N-type semiconductor region 131 is made of silicon doped with an N-type dopant
- the P-type semiconductor region 132 is made of silicon doped with a P-type dopant.
- the P ++ type semiconductor region 133 is made of silicon doped with a large amount of P type dopant. That is, the N-type semiconductor region 131 is a semiconductor region having a first impurity type (N-type), and the P-type semiconductor region 132 and the P ++ type semiconductor region 133 are semiconductor regions having a second impurity type (P-type). It is.
- the N-type semiconductor region 131 and the P-type semiconductor region 132 are stacked, the N-type semiconductor region 131 faces the lower surface 100b, and the P-type semiconductor region 132 faces the upper surface 100a.
- the P ++ type semiconductor region 133 is formed in the P type semiconductor region 132 and faces the upper surface 100a.
- the N-type semiconductor region 131, the P-type semiconductor region 132, and the P ++ type semiconductor region 133 are made of crystalline silicon and have the same crystal orientation as that of the silicon substrate 171. This is because these semiconductor regions are formed by implanting a dopant into a part of the silicon substrate 201 or are made of crystalline silicon formed on the silicon substrate 201 by an epitaxial crystal growth method.
- the ground wiring 134 is connected to the N-type semiconductor region 131 on the lower surface 100b, and the signal wiring 135 is connected to the P ++ type semiconductor region 133 on the upper surface 100a.
- the second diode 150 includes a P-type semiconductor region 151, an N-type semiconductor region 152, an N ++ type semiconductor region 153, a ground wiring 154, and a signal wiring 155.
- the P-type semiconductor region 151 is made of silicon doped with a P-type dopant
- the N-type semiconductor region 152 is made of silicon doped with an N-type dopant.
- the N ++ type semiconductor region 153 is made of silicon that is heavily doped with an N type dopant. That is, the P-type semiconductor region 151 is a semiconductor region having a second impurity type (P-type), and the N-type semiconductor region 152 and the N ++ type semiconductor region 153 are semiconductor regions having a first impurity type (N-type). It is.
- the P-type semiconductor region 151 and the N-type semiconductor region 152 are stacked, the P-type semiconductor region 151 faces the lower surface 100b, and the N-type semiconductor region 152 faces the upper surface 100a.
- the N ++ type semiconductor region 153 is formed in the N type semiconductor region 152 and faces the upper surface 100a.
- the P-type semiconductor region 151, the N-type semiconductor region 152, and the N ++ type semiconductor region 153 are made of crystalline silicon and have the same crystal orientation as that of the silicon substrate 171. This is because these semiconductor regions are formed by implanting a dopant into a part of the silicon substrate 201 or made of single crystal silicon formed on the silicon substrate 201 by an epitaxial crystal growth method.
- the ground wiring 154 is connected to the P-type semiconductor region 151 on the lower surface 100b, and the signal wiring 155 is connected to the N ++ type semiconductor region 153 on the upper surface 100a.
- the element isolation region 173 separates the first diode 130 and the second diode 150.
- the element isolation region 173 penetrates from the upper surface 100a to the lower surface 100b.
- FIG. 4 is a schematic view of the element isolation region 173 as viewed from the upper surface 100a side. As shown in the figure, the element isolation region 173 is formed around the first diode 130 and the second diode 150.
- the element isolation region 173 is made of one or more materials of silicon oxide, silicon nitride, and polysilicon.
- the element isolation region 173 has a structure in which an insulating material such as silicon oxide or silicon nitride is formed in a through hole formed in the SOI substrate 200 and polysilicon is embedded in the hole. Can do.
- the lower insulating layer 174 is disposed on the lower surface 100b and prevents diffusion of moisture and impurities.
- the lower insulating layer 174 is made of, for example, p-SiO (silicon oxide formed by plasma vapor deposition).
- the lower insulating layer 174 is patterned so that the N-type semiconductor region 131 and the P-type semiconductor region 151 are exposed, and a ground wiring 134 and a ground wiring 154 are formed in the opening.
- the ground electrode 175 is disposed on the lower insulating layer 174 and is connected to the ground wiring 134 and the ground wiring 154. Accordingly, the ground electrode 175 is electrically connected to the N-type semiconductor region 131 and the P-type semiconductor region 151, and forms a ground contact structure of the first diode 130 and the second diode 150 together with the ground wiring 134 and the ground wiring 154.
- the ground electrode 175 is made of a conductive material such as aluminum.
- the upper surface insulating layer 176 is disposed on the upper surface 100a and seals each circuit.
- the upper surface insulating layer 176 is made of an insulating material such as SiO 2 .
- FIG. 5 is a schematic diagram illustrating a circuit configuration of the impedance matching circuit 301 of the ultrasonic transducer 300 in which the semiconductor device 100 can be used.
- the impedance matching circuit 301 includes an amplifier 302, a capacitor 303, a first TR (transmit-receive) switch 304, a second TR switch 305, and a third TR switch 306.
- Each of the first TR switch 304, the second TR switch 305, and the third TR switch 306 is a back-to-back diode.
- the back-to-back diode is a diode in which two diodes are arranged so that one P-type semiconductor region and the other N-type semiconductor region are connected.
- the drive signal of the ultrasonic transducer 300 reaches the ultrasonic transducer 300 via the first TR switch 304 and the capacitor 303, and generates ultrasonic waves in the ultrasonic transducer 300.
- the drive signal is prevented from reaching the amplifier 302 by the second TR switch 305 and the third TR switch 306. Note that the capacitor 303 may be short-circuited according to the required vibrator drive.
- the ultrasonic transducer 300 When the reflected ultrasonic wave reaches the ultrasonic transducer 300, the ultrasonic transducer 300 generates a detection signal.
- the detection signal is amplified by the amplifier 302 and output.
- the impedance matching circuit 301 includes the amplifier 302 that is an amplification circuit, and the first TR switch 304, the second TR switch 305, and the third TR switch 306 that are protection circuits.
- the LV circuit 110 can be used as the amplifier 302, and the first diode 130 and the second diode 150 can be used as the TR switch, and the impedance matching circuit 301 can be realized by one semiconductor device 100. .
- the first diode 130 and the second diode 150 constitute one of the three TR switches.
- the other two TR switches can be formed in the semiconductor device 100 similarly to the first diode 130 and the second diode 150.
- the first diode 130 and the second diode 150 constitute a back-to-back diode.
- Back-to-back diodes are frequently used as elements having a Zener diode function in high-voltage elements. If the diode is in only one direction, it is necessary to connect the wiring from the side of the substrate or form a through wiring to the diode, and there is a concern about yield reduction and cost increase due to the number of manufacturing processes, and deterioration of wiring reliability. Is done.
- the first diode 130 and the second diode 150 form a back-to-back diode on the same SOI substrate, and both diodes are connected to a common ground electrode 175.
- the wiring is facilitated, so that the yield can be improved, the cost can be reduced, and the wiring reliability can be improved.
- the impedance matching circuit of the ultrasonic transducer is one of the usage forms of the semiconductor device 100, and the semiconductor device 100 is formed on an SOI substrate and can be used for various circuits including a protection circuit. .
- the semiconductor device 100 is obtained by forming the LV circuit 110, the first diode 130, and the second diode 150 on a single SOI substrate.
- a TR switch can be formed by the first diode 130 and the second diode 150. This makes it easier to release surge charges.
- latch-up free without occurrence of latch-up is realized.
- the first diode 130 and the second diode 150 are made of single crystal silicon, ensuring good leakage current characteristics and improving the function as a protection circuit.
- the mobility of polysilicon is 1 to 10 cm 2 / Vs
- the mobility of crystalline silicon is about 500 to 1000 cm 2 / Vs.
- crystalline silicon has a higher resistance. As low as 1/100 to 1/500.
- the resistance in the i layer (a layer having a low dopant concentration located at the boundary between the N-type semiconductor region and the P-type semiconductor region) becomes a problem.
- the resistance of the i layer (P: 1 ⁇ 10 ⁇ 14 / cm 3 ) having a thickness of 1 ⁇ m and an area of 25 2 ⁇ m 2 is 998 ⁇ for polysilicon, but 2 ⁇ for crystalline silicon. Therefore, the diode area required in the case of manufacturing the diode to flow 2A at 200V as a forward current, whereas in the case of polysilicon is 6242Myuemu 2, is 12.5 .mu.m 2 in the case of crystalline silicon .
- a diode made from polysilicon and 80 ⁇ m ⁇ is required, a diode made from crystalline silicon may be 4 ⁇ m ⁇ .
- a diode formed by a plurality of through trenches is required.
- one 5 ⁇ 5 ⁇ m square diode is sufficient, and the mounting area of the semiconductor device 100 can be reduced.
- semiconductor Device Manufacturing Method 1 A method for manufacturing the semiconductor device 100 will be described. As described above, the semiconductor device 100 can be manufactured from the SOI substrate 200 (see FIG. 3).
- FIG. 6 to 10 are schematic views showing a method for manufacturing the semiconductor device 100.
- FIG. 6A a sacrificial layer 204 is stacked on the SOI layer 203 of the SOI substrate 200.
- the sacrificial layer 204 is made of, for example, SiO 2 .
- FIG. 6B the sacrificial layer 204, the SOI layer 203, and the BOX layer 202 are removed by etching or the like, and the silicon substrate 201 is exposed.
- a crystalline silicon 205 is grown on the silicon substrate 201 by an epitaxial crystal growth method.
- the silicon substrate 201 and the crystalline silicon 205 have the same crystal orientation.
- a sacrificial layer 204 is laminated on the crystalline silicon 205 to form a trench T.
- the trench T is formed from the crystalline silicon 205 to the silicon substrate 201, and the depth can be about several tens of ⁇ m.
- the trench T separates part of the silicon substrate 201 and the crystalline silicon 205 to form the structure A1 and the structure A2.
- a diffusion prevention layer 206 is laminated on the sacrificial layer 204 and inside the trench T, and patterned so that the structure A1 is exposed.
- the diffusion prevention layer 206 is made of, for example, silicon nitride.
- PSG PhosphorusPSSiliconPGlass
- BSG Boron Silicon Glass
- HDP High Density Plasma
- BSG and PSG may be laminated by CVD.
- the structure A1 is doped with a dopant as shown in FIG.
- phosphorus is doped from the PSG 207 to form an N-type semiconductor region 131.
- boron is doped from the BSG 208, and a P-type semiconductor region 132 is formed.
- Solid phase diffusion can be performed by heating.
- a diffusion prevention layer 209 is laminated on the sacrificial layer 204 and inside the element isolation trench T, and patterned so that the structure A2 is exposed.
- the diffusion prevention layer 209 is made of, for example, silicon nitride.
- BSG 210 and PSG 211 are buried in the trench T as shown in FIG.
- HDP, CVD or the like can be used as described above.
- the structure A2 is doped with a dopant as shown in FIG.
- boron is doped from the BSG 210, and a P-type semiconductor region 151 is formed.
- phosphorus is doped from the PSG 211, and an N-type semiconductor region 152 is formed.
- Solid phase diffusion can be performed by heating.
- an element isolation region 173 is formed.
- the element isolation region 173 can be formed by embedding any one or two or more materials of silicon oxide, silicon nitride, or polysilicon in the trench T.
- the element isolation region 173 can be formed by forming an insulating material such as silicon oxide or silicon nitride in the trench T and filling the trench T with polysilicon.
- HDP is generally used to form the element isolation region 173, but not only PSG or BPSG (Boron Phosphorus Silicon Glass) or the like, but also an oxide film such as PSG / BPSG with good coverage is formed by CVD. Also good. Further, since the combination of HDP and polysilicon has been widely used in high voltage processes such as IGBT (Insulated Gate Bipolar Transistor), etc., it may be used.
- Region 153 is formed. These can be formed by doping the SOI layer 203, the P-type semiconductor region 132, and the N-type semiconductor region 152 with N-type and P-type dopants. The doping method is not particularly limited, and ion implantation, solid phase diffusion, or the like can be used. In addition, as shown in the drawing, a part of the SOI layer 203 is oxidized to form an element isolation layer 118.
- a signal wiring 135, a signal wiring 155, a signal wiring 119, a gate insulating film 117, a first gate electrode 115, and a second gate electrode 116 are formed.
- the gate insulating film 117 can be formed by oxidizing the SOI layer 203, and the signal wiring 135, the signal wiring 155, the signal wiring 119, the first gate electrode 115, and the second gate electrode 116 are formed by CVD of a conductive material or the like. Can be formed.
- an upper surface insulating layer 176 is formed.
- the upper surface insulating layer 176 can be formed by CVD or the like.
- the back surface of the silicon substrate 201 is polished. Polishing is performed until the N-type semiconductor region 131 and the P-type semiconductor region 151 are exposed.
- a lower surface insulating layer 174, a ground wiring 134, a ground wiring 154, and a ground electrode 175 are formed (see FIG. 1).
- the lower insulating layer 174 is formed by depositing TEOS (Tetraethyl orthosilicate) by plasma vapor deposition and patterning it. TEOS becomes SiO 2 by heating.
- the ground wiring 134, the ground wiring 154, and the ground electrode 175 can be formed by various metallization processes such as CVD.
- the semiconductor device 100 can be manufactured as described above. As described above, a part of the silicon substrate 201 of the SOI substrate 200 becomes the silicon substrate 171 of the semiconductor device 100, and a part of the BOX layer 202 of the SOI substrate 200 becomes the BOX layer 172 of the semiconductor device 100.
- the semiconductor device 100 can also be manufactured as follows.
- FIG. 11 and 12 are schematic views showing another method for manufacturing the semiconductor device 100.
- a sacrificial layer 204 is stacked on the SOI layer 203 of the SOI substrate 200.
- the sacrificial layer 204 is made of, for example, SiO 2 .
- FIG. 11B the sacrificial layer 204, the SOI layer 203, the BOX layer 202, and a part of the silicon substrate 201 are removed by etching or the like, so that the silicon substrate 201 is exposed.
- an N-type semiconductor region 212 and a P-type semiconductor region 213 are formed. These can be formed by doping the silicon substrate 201 with N-type and P-type dopants by ion implantation or solid phase diffusion.
- crystal silicon 214 is grown by an epitaxial crystal growth method.
- dopant is doped by ion implantation or solid phase diffusion to form an N-type semiconductor region 212 and a P-type semiconductor region 213.
- the growth of the crystalline silicon 214 and the doping of the dopant are performed until the N-type semiconductor region 212 and the P-type semiconductor region 213 have a certain thickness.
- crystal silicon 214 is grown by an epitaxial crystal growth method, and at the same time, a P-type semiconductor region 215 and an N-type semiconductor region 216 are formed.
- the P-type semiconductor region 215 is formed on the N-type semiconductor region 212
- the N-type semiconductor region 216 is formed on the P-type semiconductor region 213.
- the P-type semiconductor region 215 and the N-type semiconductor region 216 can be formed by doping dopants by ion implantation or solid phase diffusion.
- the growth of the crystalline silicon 214 and the doping of the dopant are performed until the P-type semiconductor region 215 and the N-type semiconductor region 216 have a certain thickness.
- FIG. 12C shows a state where the growth of the crystalline silicon 214 and the doping of the dopant are completed.
- the N-type semiconductor region 212 corresponds to the N-type semiconductor region 131 (see FIG. 2) of the first diode 130
- the P-type semiconductor region 213 corresponds to the P-type semiconductor region 151 of the second diode 150.
- the P-type semiconductor region 215 corresponds to the P-type semiconductor region 132 of the first diode 130
- the N-type semiconductor region 216 corresponds to the N-type semiconductor region 152 of the second diode 150.
- the silicon substrate 201 around the first diode 130 and the second diode 150 is oxidized to form silicon oxide, and an element isolation region 173 is formed as in FIG. 9B.
- the LV circuit 110, wiring, and the like can be formed in the same manner as in the above manufacturing method, and the semiconductor device 100 can be manufactured.
- the manufacturing method of the semiconductor device 100 is not limited to the above-described method, and any manufacturing method capable of manufacturing the semiconductor device 100 from the SOI substrate 200 may be used.
- FIG. 13 is a cross-sectional view showing a configuration of a semiconductor device 400 according to the first modification of the present technology. As shown in the figure, the semiconductor device 400 includes a ground wiring 401. Other configurations of the semiconductor device 400 are the same as those of the semiconductor device 100.
- the ground wiring 401 is connected to both the N-type semiconductor region 131 of the first diode 130 and the P-type semiconductor region 151 of the second diode 150 and the ground electrode 175.
- the ground wiring 401 can be a common ground wiring of the first diode 130 and the second diode 150. It is. Thereby, the width of the element isolation region 173 can be reduced, and the area of the semiconductor device 400 can be reduced.
- FIG. 14 is a cross-sectional view showing a configuration of a semiconductor device 500 according to a second modification of the present technology.
- the semiconductor device 500 includes a ground wiring 501 and a signal wiring 502.
- Other configurations of the semiconductor device 500 are the same as those of the semiconductor device 100.
- the ground wiring 501 is connected to both the N-type semiconductor region 131 of the first diode 130 and the P-type semiconductor region 151 of the second diode 150 and the ground electrode 175.
- the signal wiring 502 is connected to both the P ++ type semiconductor region 133 of the first diode 130 and the N ++ type semiconductor region 153 of the second diode 150.
- the signal wiring 502 can be a common signal wiring of the first diode 130 and the second diode 150. It is. Thereby, the width of the element isolation region 173 can be reduced, and the area of the semiconductor device 500 can be reduced.
- FIG. 15 is a schematic diagram showing a structure of an IVUS (intravascular ultrasound) 600 that can use the semiconductor device 100 according to the present embodiment.
- the IVUS 600 includes a catheter 601, an array transducer 602, and a wiring 603.
- the array transducer 602 is an array composed of a plurality of ultrasonic transducer modules, and each ultrasonic transducer module includes an ultrasonic transducer 300 and an impedance matching circuit 301 as shown in FIG.
- the impedance matching circuit 301 can be realized by the semiconductor device 100.
- the drive signal When a drive signal is input to the IVUS 600, the drive signal is transmitted to the ultrasonic transducer 300 via the impedance matching circuit 301, and the ultrasonic transducer 300 generates an ultrasonic wave.
- the generated ultrasonic wave is irradiated to the blood vessel wall via the catheter 601 inserted into the blood vessel, and the reflected wave enters the ultrasonic transducer 300 via the catheter 601 and is detected.
- the detection signal is amplified in the impedance matching circuit 301 and transmitted to the IVUS 600 control device via the wiring 603.
- FIG. 16 is a schematic diagram of IVUS700 having a general structure. As shown in the figure, the IVUS 700 includes a catheter 701, an array transducer 702, a signal processing chip 703, and a wiring 704. The IVUS 700 operates in the same manner as the IVUS 600, but the impedance matching circuit is mounted on the signal processing chip 703.
- the drive signal is about tens of volts and the detection signal is about tens of microvolts.
- the size of an ultrasonic transducer is as small as several tens of ⁇ m, and it is difficult to output a signal to the outside of the catheter due to mismatching of electrical impedance. Therefore, signal processing including an impedance matching circuit as shown in FIG. A chip is provided.
- the impedance matching circuit is made of silicon, this portion lacks flexibility, and the operability of IVUS is difficult.
- the impedance matching circuit can be integrated with the ultrasonic transducer as shown in FIG. 16, and the number of parts that cannot be bent is reduced, thereby improving the operability of IVUS. be able to.
- the semiconductor device 100 can be used for all integrated circuits using SOI substrates in addition to IVUS. It is expected that the merit is particularly great in application to ESD (electrostatic discharge) or low voltage circuits that may be exposed to intentionally formed high voltage pulses.
- ESD electrostatic discharge
- FIG. 20 is a schematic diagram showing the structure of an intraoperative ultrasonic probe 1000 that can use the semiconductor device 100 according to the present embodiment.
- the intraoperative ultrasound probe 1000 includes an acoustic lens 1001, an array transducer 1002, and wiring 1003.
- the array transducer 1002 is an array composed of a plurality of ultrasonic transducer modules, and each ultrasonic transducer module includes the ultrasonic transducer 300 and the semiconductor device 100.
- the semiconductor device 100 constitutes an impedance matching circuit 301 as shown in FIG.
- the drive signal When a drive signal is input to the intraoperative ultrasonic probe 1000, the drive signal is transmitted to the ultrasonic transducer 300 via the impedance matching circuit, and the ultrasonic transducer 300 generates an ultrasonic wave.
- the generated ultrasonic wave is irradiated onto the diagnostic object via the acoustic lens 1001, and the reflected wave is incident on the ultrasonic transducer 300 via the acoustic lens 1001 and detected.
- the detection signal is amplified in the impedance matching circuit and transmitted to the control device of the intraoperative ultrasonic probe 1000 via the wiring 1003.
- FIG. 21 is a schematic diagram of an intraoperative ultrasonic probe 1100 having a general structure.
- the intraoperative ultrasound probe 1100 includes an acoustic lens 1101, an array transducer 1102, and a wiring 1103.
- the array transducer 1102 is an array composed of a plurality of ultrasonic transducer modules, and each ultrasonic transducer module includes an ultrasonic transducer 300.
- the intraoperative ultrasound probe 1100 operates in the same manner as the intraoperative ultrasound probe 1000, but the array transducer 1102 does not have a semiconductor device that constitutes an impedance matching circuit.
- an intra-operative ultrasonic probe generally uses an array transducer, the size of the ultrasonic transducer is as small as several tens of ⁇ m.
- a drop-in type intraoperative ultrasound probe is required to be further downsized in order to be easily operated with forceps. For this reason, it has become difficult to output a signal outside the ultrasonic probe due to electrical impedance mismatch.
- FIG. 22 is a schematic diagram showing a structure of a laparoscopic surgical grasping tool 1200 that can use the semiconductor device 100 according to the present embodiment.
- a laparoscopic surgical grasping tool 1200 includes a grasping part 1201, an acoustic lens 1202, an array transducer 1203, and a wiring 1204.
- the gripper 1201 is configured to be able to grip an object.
- the array transducer 1203 is an array composed of a plurality of ultrasonic transducer modules, and is mounted inside the grip portion 1201.
- Each ultrasonic transducer module includes an ultrasonic transducer 300 and a semiconductor device 100.
- the semiconductor device 100 constitutes an impedance matching circuit 301 as shown in FIG.
- the drive signal When a drive signal is input to the laparoscopic grasping tool 1200, the drive signal is transmitted to the ultrasonic transducer 300 via the impedance matching circuit, and the ultrasonic transducer 300 generates an ultrasonic wave.
- the generated ultrasonic wave is applied to the diagnostic object that the acoustic lens 1202 contacts, and the reflected wave enters the ultrasonic transducer 300 and is detected.
- the detection signal is amplified in the impedance matching circuit and transmitted to the control device of the grasping tool for laparoscopic surgery 1200 through the wiring 1204.
- FIG. 23 is a schematic diagram of a grasping tool 1300 for laparoscopic surgery having a general structure.
- a laparoscopic surgical gripping tool 1300 includes a gripping portion 1301, an acoustic lens 1302, an array transducer 1303, and wiring 1304.
- the array transducer 1303 is an array composed of a plurality of ultrasonic transducer modules, and each ultrasonic transducer module includes an ultrasonic transducer 300.
- the laparoscopic surgical gripping tool 1300 operates in the same manner as the laparoscopic surgical gripping tool 1200, but the array transducer 1303 does not have a semiconductor device constituting an impedance matching circuit.
- FIG. 24 is a schematic diagram showing a structure of a handle portion of a laparoscopic surgical grasping tool 1400 that can use the semiconductor device 100 according to the present embodiment.
- a laparoscopic surgical gripping tool 1400 includes a handle portion shown in the figure and a gripping portion like the laparoscopic surgical gripping tool 1300 shown in FIG.
- a semiconductor device 100 constituting an impedance matching circuit of the ultrasonic transducer 300 is mounted on the handle portion. Each semiconductor device 100 is connected to the array transducer via a wiring 1401.
- Surgical tools incorporating an ultrasonic probe at the tip of a grasping tool for laparoscopic surgery enable fluoroscopy with intraoperative ultrasound without introducing an extra port for intraoperative ultrasound examination.
- the tip of the grasping tool is as small as about 2 ⁇ 10 mm, and the characteristic impedance is increased, so that the characteristics are deteriorated as compared with the existing intraoperative ultrasound.
- the semiconductor device 100 is mounted on the tip of the gripper.
- the handle of the gripper as shown in FIG. It may be mounted on the part.
- FIG. 25 is a schematic diagram showing the structure of the robot forceps of the surgical robot 1500 for laparoscopic surgery that can use the semiconductor device 100 according to the present embodiment.
- a surgical robot 1500 for laparoscopic surgery includes a gripping part 1501, an acoustic lens 1502, an array transducer 1503, and a wiring 1504.
- the array transducer 1503 is an array composed of a plurality of ultrasonic transducer modules, and each ultrasonic transducer module includes the ultrasonic transducer 300 and the semiconductor device 100.
- the semiconductor device 100 constitutes an impedance matching circuit 301 as shown in FIG.
- the drive signal When a drive signal is input to the gripper 1501, the drive signal is transmitted to the ultrasonic transducer 300 via the impedance matching circuit, and the ultrasonic transducer 300 generates an ultrasonic wave.
- the generated ultrasonic wave is applied to the diagnostic object that the acoustic lens 1502 contacts, and the reflected wave is incident on the ultrasonic transducer 300 and detected.
- the detection signal is amplified in the impedance matching circuit and transmitted to the control device of the surgical robot 1500 for laparoscopic surgery via the wiring 1504.
- FIG. 26 is a schematic diagram showing the structure of the robot forceps of the surgical robot 1600 for laparoscopic surgery having a general structure.
- a surgical robot 1600 for laparoscopic surgery includes a gripping portion 1601, an acoustic lens 1602, an array transducer 1603, and wiring 1604.
- the array transducer 1603 is an array composed of a plurality of ultrasonic transducer modules, and each ultrasonic transducer module includes an ultrasonic transducer 300.
- the laparoscopic surgical robot 1600 operates in the same manner as the laparoscopic surgical robot 1500, but the array transducer 1603 does not have a semiconductor device constituting an impedance matching circuit.
- Surgical robots that incorporate an ultrasonic probe at the tip of the robot forceps of a surgical robot for laparoscopic surgery can be viewed with intraoperative ultrasound without introducing an extra port for intraoperative ultrasound inspection.
- the tip of the grasping tool is as small as about 2 ⁇ 10 mm, and the characteristic impedance is increased, so that the characteristics are deteriorated as compared with the existing intraoperative ultrasound. For this reason, as shown in FIG. 25, when the present technology is applied to such a gripping tool, it helps to maintain the characteristics of the ultrasonic probe.
- the semiconductor device 100 can be used for small-sized and small-sized medical devices such as intraoperative ultrasonic imaging devices, ultrasonic catheters, and ultrasonic endoscopes.
- the semiconductor device 100 is small in size, such as a geodesic ultrasonic echo and sensor, a millimeter wave sensor power circuit, an LED (light emitting diode) control circuit for an automobile or a projector, and a 48V / 24V / 12V telecom / modem circuit. It can be used for miniaturization of control circuits for small mechatronics such as miniature robots and endoscopes, reduction of full digital amplifier circuits for audio, miniaturization of control circuits for HEMS (home energy management system), etc. it can.
- the semiconductor device 100 By using the semiconductor device 100, it is possible to reduce the size of the device by reducing the size of the integrated circuit, improve the SNR (signal-noise ratio) by bundling with the amplifier circuit, and reduce the hard portion caused by the semiconductor chip. It is possible to improve the operability of the endoscope and the like, increase the yield and theoretical yield by reducing the semiconductor chip, and thus reduce the manufacturing cost.
- SNR signal-noise ratio
- FIG. 17 is a cross-sectional view showing a configuration of the semiconductor device 800 according to the present embodiment
- FIG. 18 is a cross-sectional view showing a partial configuration of the semiconductor device 800.
- the semiconductor device 800 includes an LV (Low Voltage) circuit 810, a first transistor 830 and a second transistor 850, a silicon substrate 871, a BOX layer 872, an element isolation region 873, a lower surface insulating layer 874, a ground electrode. 875 and an upper insulating layer 876.
- LV Low Voltage
- the semiconductor device 800 is an integrated circuit including an LV circuit 810, a first transistor 830, and a second transistor 850, and the first transistor 830 and the second transistor 850 constitute a protection circuit for this integrated circuit.
- the semiconductor device 800 can be manufactured from a single SOI substrate 200 (see FIG. 3), as in the first embodiment.
- the silicon substrate 871 of the semiconductor device 800 is a part of the silicon substrate 201 of the SOI substrate 200, and the BOX layer 872 of the semiconductor device 800 is a part of the BOX layer 202 of the SOI substrate 200.
- the surface on the LV circuit 810 side is referred to as an upper surface 800a, and the opposite surface is referred to as a lower surface 800b.
- the LV circuit 810 includes an N-type semiconductor region 811, a P-type semiconductor region 812, an N ++ type semiconductor region 813, a P ++ type semiconductor region 814, a first gate electrode 815, a second gate electrode 816, a gate insulating film 817, and an element isolation.
- a layer 818 and a signal wiring 819 are provided.
- the N-type semiconductor region 811 is stacked on the BOX layer 872 and is made of silicon doped with an N-type dopant.
- the N-type dopant is typically phosphorus.
- the P-type semiconductor region 812 is stacked on the BOX layer 872 and is made of silicon doped with a P-type dopant.
- the P-type dopant is typically boron.
- the N-type semiconductor region 811 and the P-type semiconductor region 812 face the upper surface 800a and are separated by an element isolation layer 818 made of SiO 2 .
- the N + + type semiconductor region 813 is made of silicon doped with a large amount of N type dopant, and is formed at two positions in the P type semiconductor region 812 so as to be separated from each other.
- Each N ++ type semiconductor region 813 faces the upper surface 800a, and a signal wiring 819 is connected thereto.
- the P ++ type semiconductor region 814 is made of silicon doped with a large amount of P type dopant, and is formed at two positions in the N type semiconductor region 811 so as to be separated from each other. Each P ++ type semiconductor region 814 faces the upper surface 800a and is connected to a signal wiring 819.
- the first gate electrode 815 is made of a metal such as aluminum or a conductive material such as polysilicon, and is formed on the N-type semiconductor region 811 with a gate insulating film 817 interposed therebetween.
- the second gate electrode 816 is made of a metal such as aluminum or a conductive material such as polysilicon, and is formed on the P-type semiconductor region 812 with a gate insulating film 817 interposed therebetween.
- the N-type semiconductor region 811, the P-type semiconductor region 812, the N ++ type semiconductor region 813, and the P ++ type semiconductor region 814 are regions formed by injecting a P-type or N-type dopant into the SOI layer 203 of the SOI substrate 200. is there.
- the element isolation layer 818 is a region formed by oxidizing the SOI layer 203 into SiO 2 .
- the configuration of the LV circuit 810 is not limited to the above, and any configuration that can be manufactured by processing the SOI layer 203 of the SOI substrate 200 may be used.
- the first transistor 830 is a vertical transistor, and includes a first P-type semiconductor region 831, an N ⁇ -type semiconductor region 832, a second P-type semiconductor region 833, a P ++ type semiconductor region 834, a gate electrode 835, a ground wiring 836, and a signal wiring. 837 is provided.
- the first P-type semiconductor region 831 and the second P-type semiconductor region 833 are made of silicon doped with a P-type dopant
- the N ⁇ -type semiconductor region 832 is made of silicon doped with a small amount of N-type dopant.
- the P ++ type semiconductor region 834 is made of silicon that is heavily doped with a P type dopant.
- the first P-type semiconductor region 831, the N ⁇ -type semiconductor region 832, and the second P-type semiconductor region 833 are stacked in this order, the first P-type semiconductor region 831 faces the lower surface 800b, and the second P-type semiconductor region 833 faces the upper surface 800a. Face.
- the P ++ type semiconductor region 834 is formed in the second P type semiconductor region 833 and faces the upper surface 800a.
- the first P-type semiconductor region 831, the N ⁇ -type semiconductor region 832, the second P-type semiconductor region 833 and the P ++ -type semiconductor region 834 are made of crystalline silicon and have the same crystal orientation as the silicon substrate 871. This is because these semiconductor regions are formed by implanting a dopant into a part of the silicon substrate 201 or are made of crystalline silicon formed on the silicon substrate 201 by an epitaxial crystal growth method.
- the gate electrode 835 is embedded in the element isolation region 873 and functions as the gate electrode of the first transistor 830.
- the gate electrode 835 is made of polysilicon.
- the element isolation region 873 can have a structure in which an insulating material such as silicon oxide or silicon nitride is formed in a hole of a through hole formed in the SOI substrate 200 and polysilicon is filled in the hole. This polysilicon can be used as the gate electrode 835.
- the ground wiring 836 is connected to the first P-type semiconductor region 831 on the lower surface 800b, and the signal wiring 837 is connected to the P ++ type semiconductor region 834 on the upper surface 800a.
- the second transistor 850 is a vertical transistor and includes a P-type semiconductor region 851, an N-type semiconductor region 852, an N ++ type semiconductor region 853, a gate electrode 854, a ground wiring 855, and a signal wiring 856.
- the P-type semiconductor region 851 is made of silicon doped with a P-type dopant
- the N-type semiconductor region 852 is made of silicon doped with an N-type dopant.
- the N ++ type semiconductor region 853 is made of silicon that is heavily doped with an N type dopant.
- the P-type semiconductor region 851 and the N-type semiconductor region 852 are stacked, the P-type semiconductor region 851 faces the lower surface 800b, and the N-type semiconductor region 852 faces the upper surface 800a.
- the N ++ type semiconductor region 853 is formed in the N type semiconductor region 852 and faces the upper surface 800a.
- the P-type semiconductor region 851, the N-type semiconductor region 852, and the N ++ type semiconductor region 853 are made of crystalline silicon and have the same crystal orientation as that of the silicon substrate 201. This is because these semiconductor regions are formed by implanting a dopant into a part of the silicon substrate 201 or are made of crystalline silicon formed on the silicon substrate 201 by an epitaxial crystal growth method.
- the gate electrode 854 is embedded in the element isolation region 873 and functions as the gate electrode of the second transistor 850.
- the gate electrode 854 is made of polysilicon.
- the element isolation region 873 can have a structure in which an insulating material such as silicon oxide or silicon nitride is formed in a hole of a through hole formed in the SOI substrate 200 and polysilicon is filled in the hole. This polysilicon can be used as the gate electrode 854.
- the ground wiring 855 is connected to the P-type semiconductor region 851 on the lower surface 800b, and the signal wiring 856 is connected to the N ++ type semiconductor region 853 on the upper surface 800a.
- the element isolation region 873 isolates the first transistor 830 and the second transistor 850.
- the element isolation region 873 penetrates from the upper surface 800a to the lower surface 800b.
- the element isolation region 873 is formed around the first transistor 830 and the second transistor 850 as in the first embodiment (see FIG. 4).
- the element isolation region 873 is made of one or more materials of silicon oxide, silicon nitride, or polysilicon.
- the element isolation region 873 has a structure in which an insulating material such as silicon oxide or silicon nitride is formed in a hole of a through hole formed in the SOI substrate 200 and polysilicon is filled in the hole. Can do.
- polysilicon can be used as the gate electrode 835 and the gate electrode 854.
- the lower surface insulating layer 874 is disposed on the lower surface 800b and prevents diffusion of moisture and impurities.
- the lower insulating layer 874 is made of, for example, p-SiO (silicon oxide formed by plasma vapor deposition).
- the lower insulating layer 874 is patterned so that the first P-type semiconductor region 831 and the P-type semiconductor region 851 are exposed, and a ground wiring 836 and a ground wiring 855 are formed in the opening.
- the ground electrode 875 is disposed on the lower insulating layer 874 and is connected to the ground wiring 836 and the ground wiring 855. Accordingly, the ground electrode 875 is electrically connected to the first P-type semiconductor region 831 and the P-type semiconductor region 851, and constitutes a ground contact structure of the first transistor 830 and the second transistor 850 together with the ground wiring 836 and the ground wiring 855.
- the ground electrode 875 is made of a conductive material such as aluminum.
- the upper surface insulating layer 876 is disposed on the upper surface 800a and seals each circuit.
- the upper insulating layer 876 is made of an insulating material such as SiO 2 .
- FIG. 5 is a schematic diagram showing a circuit configuration of the impedance matching circuit 901 of the ultrasonic transducer 900 that can use the semiconductor device 100.
- the impedance matching circuit 901 includes an amplifier 902, a first TR (transmit-receive) switch 903, and a second TR switch 904.
- the drive signal of the ultrasonic transducer 900 When the drive signal of the ultrasonic transducer 900 is input when the first TR switch 903 and the second TR switch 904 are OFF, the drive signal reaches the ultrasonic transducer 900 and generates an ultrasonic wave in the ultrasonic transducer 900. Let The drive signal is prevented from reaching the amplifier 902 by the first TR switch 903 and the second TR switch 904.
- the first TR switch 903 and the second TR switch 904 are switched ON immediately after the drive signal reaches the ultrasonic transducer 900.
- the ultrasonic transducer 900 When the reflected ultrasonic wave reaches the ultrasonic transducer 900, the ultrasonic transducer 900 generates a detection signal.
- the detection signal reaches the amplifier 902 via the first TR switch 903, is amplified by the amplifier 902, and is output via the second TR switch 904.
- the impedance matching circuit 901 includes the amplifier 902 that is an amplifier circuit, and the first TR switch 903 and the second TR switch 904 that are protection circuits.
- the LV circuit 810 can be used as the amplifier 902, the first transistor 830 can be used as the first TR switch 903, and the second transistor 850 can be used as the second TR switch 904, and the impedance matching circuit 901 can be used as one semiconductor device 800. Can be realized.
- the impedance matching circuit of the ultrasonic vibrator is one of the usage forms of the semiconductor device 800, and the semiconductor device 800 can be used for various circuits including an amplifier circuit and a protection circuit.
- the semiconductor device 800 is obtained by forming the LV circuit 810, the first transistor 830, and the second transistor 850 on one SOI substrate.
- a TR switch can be formed by the first transistor 830 and the second transistor 850. The surge charge can be easily released.
- latch-up free is realized by adopting a through trench structure that penetrates the element isolation region 873 of the first transistor 830 and the second transistor 850 from the upper surface 800a to the lower surface 800b.
- first transistor 830 and the second transistor 850 are made of single crystal silicon, and as in the first embodiment, it is possible to ensure good leakage current characteristics, improve the function as a protection circuit, and reduce the mounting area. It is.
- a method for manufacturing the semiconductor device 800 will be described. As described above, the semiconductor device 800 can be manufactured from the SOI substrate 200 (see FIG. 3), and can be manufactured in the same manner as the semiconductor device 100 according to the first embodiment.
- an insulating material such as silicon oxide or silicon nitride is formed in the trench T (see FIG. 9A) when the element isolation region 873 is formed. Polysilicon is buried in the trench T. Wiring can be applied to this polysilicon to form the gate electrode 835 and the gate electrode 854.
- the semiconductor device 800 can be used as an impedance matching circuit of an ultrasonic transducer in IVUS. Since the impedance matching circuit can be integrated with the ultrasonic transducer, the operability of IVUS can be improved. Similarly to the first embodiment, the semiconductor device 800 is impedance-matched in various ultrasonic imaging systems such as an intraoperative ultrasonic probe, an ultrasonic endoscope, a laparoscopic surgical gripper, and a laparoscopic surgical robot. It can be used as a circuit.
- the semiconductor device 800 can also be used for all integrated circuits using an SOI substrate, as in the first embodiment.
- the size of the device can be reduced by reducing the size of the integrated circuit, the SNR (signal-noise ratio) can be improved by bundling with the amplifier circuit, and the hard part caused by the semiconductor chip can be reduced. It is possible to improve the operability of the endoscope and the like, increase the yield and theoretical yield by reducing the semiconductor chip, and thus reduce the manufacturing cost.
- a semiconductor comprising an integrated circuit formed on an SOI substrate comprising a silicon substrate made of crystalline silicon, a BOX (buried oxide) layer laminated on the silicon substrate, and an SOI (silicon on insulator) layer laminated on the BOX layer A device,
- a protection circuit comprising a semiconductor region constituting the integrated circuit and having the same crystal orientation as the silicon substrate; An element isolation region that penetrates the SOI substrate and isolates the protection circuit.
- the protection circuit is a diode.
- the protection circuit is a vertical transistor.
- the element isolation region is a semiconductor device made of one or more of silicon oxide, silicon nitride, and polysilicon.
- the element isolation region includes a gate electrode of the vertical transistor.
- the semiconductor device has a first surface and a second surface opposite to the first surface
- the protection circuit includes a first semiconductor element and a second semiconductor element
- the first semiconductor element includes a first semiconductor region having a first impurity type on the first surface side and a second semiconductor region having a second impurity type on the second surface side.
- a semiconductor region is stacked and configured.
- the second semiconductor element includes a third semiconductor region on the first surface side and having the second impurity type, and a second semiconductor side on the second surface side and having the first impurity type.
- a semiconductor device configured by stacking four semiconductor regions.
- the semiconductor device according to (6) further including a ground contact structure that is provided on the first surface of the semiconductor device and is electrically connected to the first semiconductor region and the third semiconductor region. .
- ground contact structure is connected to the ground wiring and includes a common ground electrode in both the first semiconductor region and the third semiconductor region.
- a semiconductor device including an integrated circuit formed on an SOI substrate including a silicon substrate made of crystalline silicon, a BOX layer stacked on the silicon substrate, and an SOI layer stacked on the BOX layer, wherein the integrated circuit is
- An ultrasonic imaging apparatus comprising: a semiconductor device comprising: a protection circuit including a semiconductor region having the same crystal orientation as that of the silicon substrate; and an element isolation region penetrating the SOI substrate and separating the protection circuit.
- a method for manufacturing a semiconductor device according to (12) above In the step of forming the protection circuit, a substrate polishing method is used in which the silicon substrate is polished from a surface opposite to the surface of the semiconductor region where crystal growth proceeds to expose the semiconductor region. Production method.
- a semiconductor device including an integrated circuit formed on an SOI substrate including a silicon substrate made of crystalline silicon, a BOX layer stacked on the silicon substrate, and an SOI layer stacked on the BOX layer, wherein the integrated circuit is And an ultrasonic catheter including a semiconductor device including a protection circuit including a semiconductor region having the same crystal orientation as the silicon substrate and an element isolation region penetrating the SOI substrate and separating the protection circuit.
- Acoustic imaging system including a semiconductor device including a protection circuit including a semiconductor region having the same crystal orientation as the silicon substrate and an element isolation region penetrating the SOI substrate and separating the protection circuit.
- a semiconductor device including an integrated circuit formed on an SOI substrate including a silicon substrate made of crystalline silicon, a BOX layer stacked on the silicon substrate, and an SOI layer stacked on the BOX layer, wherein the integrated circuit is An intraoperative ultrasonic probe or a superstructure comprising a semiconductor device comprising a protection circuit comprising a semiconductor region having the same crystal orientation as the silicon substrate and an element isolation region penetrating the SOI substrate and separating the protection circuit; Ultrasound imaging system including sonic endoscope.
- a semiconductor device including an integrated circuit formed on an SOI substrate including a silicon substrate made of crystalline silicon, a BOX layer stacked on the silicon substrate, and an SOI layer stacked on the BOX layer, wherein the integrated circuit is In laparoscopic surgery, comprising a semiconductor device comprising a protection circuit comprising a semiconductor region having the same crystal orientation as the silicon substrate and an element isolation region penetrating the SOI substrate and separating the protection circuit Ultrasound imaging system including handheld instrument with ultrasound imaging function used.
- a semiconductor device including an integrated circuit formed on an SOI substrate including a silicon substrate made of crystalline silicon, a BOX layer stacked on the silicon substrate, and an SOI layer stacked on the BOX layer, wherein the integrated circuit is In laparoscopic surgery, comprising a semiconductor device comprising a protection circuit comprising a semiconductor region having the same crystal orientation as the silicon substrate and an element isolation region penetrating the SOI substrate and separating the protection circuit Ultrasound imaging system including robotic forceps with ultrasound imaging function used.
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Abstract
Description
上記保護回路は、上記集積回路を構成し、上記シリコン基板と同じ結晶配向を有する半導体領域を備える。
上記素子分離領域は、上記SOI基板を貫通し、上記保護回路を分離する。
上記保護回路は、第1の半導体素子と第2の半導体素子を含み、
上記第1の半導体素子は、上記第1の面側であって第1の不純物型を有する第1の半導体領域と、上記第2の面側であって第2の不純物型を有する第2の半導体領域が積層されて構成され、
上記第2の半導体素子は、上記第1の面側であって上記第2の不純物型を有する第3の半導体領域と、上記第2の面側であって上記第1の不純物型を有する第4の半導体領域が積層されて構成されていてもよい。
上記半導体装置は、結晶シリコンからなるシリコン基板、上記シリコン基板に積層されたBOX層及び上記BOX層に積層されたSOI層を備えるSOI基板上に形成された、集積回路を備える半導体装置であって、上記集積回路を構成し、上記シリコン基板と同じ結晶配向を有する半導体領域を備える保護回路と、上記SOI基板を貫通し、上記保護回路を分離する素子分離領域とを備える。
エピタキシャル結晶成長法により、上記シリコン基板上に上記シリコン基板と同じ結晶配向を有する半導体領域を備え、上記集積回路を構成する保護回路を形成する。
上記SOI基板を貫通し、上記保護回路を分離する素子分離領域を形成する。
上記超音波カテーテルは、結晶シリコンからなるシリコン基板、上記シリコン基板に積層されたBOX層及び上記BOX層に積層されたSOI層を備えるSOI基板上に形成された、集積回路を備える半導体装置であって、上記集積回路を構成し、上記シリコン基板と同じ結晶配向を有する半導体領域を備える保護回路と、上記SOI基板を貫通し、上記保護回路を分離する素子分離領域とを備える半導体装置を搭載する。
上記術中超音波プローブ又は上記超音波内視鏡は、結晶シリコンからなるシリコン基板、上記シリコン基板に積層されたBOX層及び上記BOX層に積層されたSOI層を備えるSOI基板上に形成された、集積回路を備える半導体装置であって、上記集積回路を構成し、上記シリコン基板と同じ結晶配向を有する半導体領域を備える保護回路と、上記SOI基板を貫通し、上記保護回路を分離する素子分離領域とを備える半導体装置を搭載する。
上記超音波イメージング機能付き手持ち器具は、結晶シリコンからなるシリコン基板、上記シリコン基板に積層されたBOX層及び上記BOX層に積層されたSOI層を備えるSOI基板上に形成された、集積回路を備える半導体装置であって、上記集積回路を構成し、上記シリコン基板と同じ結晶配向を有する半導体領域を備える保護回路と、上記SOI基板を貫通し、上記保護回路を分離する素子分離領域とを備える半導体装置を搭載する。
上記超音波イメージング機能付きロボット鉗子は、結晶シリコンからなるシリコン基板、上記シリコン基板に積層されたBOX層及び上記BOX層に積層されたSOI層を備えるSOI基板上に形成された、集積回路を備える半導体装置であって、上記集積回路を構成し、上記シリコン基板と同じ結晶配向を有する半導体領域を備える保護回路と、上記SOI基板を貫通し、上記保護回路を分離する素子分離領域とを備える半導体装置を搭載する。
本技術の第1の実施形態に係る半導体装置について説明する。
図1は、本実施形態に係る半導体装置100の構成を示す断面図であり、図2は、半導体装置100の一部構成を示す断面図である。これらの図に示すように半導体装置100は、LV(Low Voltage)回路110、第1ダイオード130及び第2ダイオード150、シリコン基板171、BOX(buried oxide:埋め込み酸化膜)層172、素子分離領域173、下面絶縁層174、グランド電極175及び上面絶縁層176を備える。
図5は、半導体装置100を利用することが可能な、超音波振動子300のインピーダンス整合回路301の回路構成を示す模式図である。
上記のように半導体装置100は、LV回路110、第1ダイオード130及び第2ダイオード150を一枚のSOI基板上に形成したものである。SOI基板200にBOX層202がないチャネル領域を形成し、そこに第1ダイオード130及び第2ダイオード150を形成することにより、第1ダイオード130及び第2ダイオード150によってTRスイッチを形成することができ、サージ電荷を逃がしやすくなっている。
半導体装置100の製造方法について説明する。上記のように半導体装置100は、SOI基板200(図3参照)から作成することができる。
ゲート絶縁膜117は、SOI層203の酸化によって形成することができ、信号配線135、信号配線155、信号配線119、第1ゲート電極115及び第2ゲート電極116は導電性材料のCVD成膜等によって形成することができる。
半導体装置100は、次のようにして作製することも可能である。
図13は本技術の第1の変形例に係る半導体装置400の構成を示す断面図である。同図に示すように半導体装置400は、グランド配線401を備える。半導体装置400のその他の構成は半導体装置100と同一である。
図15は、本実施形態に係る半導体装置100を利用することが可能なIVUS(intravascular ultrasound:血管内超音波内視鏡)600の構造を示す模式図である。
同図に示すように、IVUS600は、カテーテル601、アレイ振動子602、及び配線603を備える。アレイ振動子602は、複数の超音波振動子モジュールから構成されたアレイであり、各超音波振動子モジュールは図5に示すように超音波振動子300とインピーダンス整合回路301からなる。上記のようにインピーダンス整合回路301は、半導体装置100によって実現することができる。
図20は、本実施形態に係る半導体装置100を利用することが可能な術中超音波プローブ1000の構造を示す模式図である。術中超音波プローブ1000は、音響レンズ1001、アレイ振動子1002及び配線1003を備える。アレイ振動子1002は、複数の超音波振動子モジュールから構成されたアレイであり、各超音波振動子モジュールは超音波振動子300と半導体装置100からなる。半導体装置100は、図5に示すようにインピーダンス整合回路301を構成している。
図22は、本実施形態に係る半導体装置100を利用することが可能な腹腔鏡手術用把持具1200の構造を示す模式図である。腹腔鏡手術用把持具1200は、把持部1201、音響レンズ1202、アレイ振動子1203及び配線1204を備える。把持部1201は、物体を把持可能に構成されている。アレイ振動子1203は、複数の超音波振動子モジュールから構成されたアレイであり、把持部1201の内部に搭載されている。各超音波振動子モジュールは超音波振動子300と半導体装置100からなる。半導体装置100は、図5に示すようにインピーダンス整合回路301を構成している。
図25は、本実施形態に係る半導体装置100を利用することが可能な腹腔鏡手術用手術ロボット1500のロボット鉗子の構造を示す模式図である。腹腔鏡手術用手術ロボット1500は、把持部1501、音響レンズ1502、アレイ振動子1503及び配線1504を備える。アレイ振動子1503は、複数の超音波振動子モジュールから構成されたアレイであり、各超音波振動子モジュールは超音波振動子300と半導体装置100からなる。半導体装置100は、図5に示すようにインピーダンス整合回路301を構成している。
本技術の第2の実施形態に係る半導体装置について説明する。
図17は、本実施形態に係る半導体装置800の構成を示す断面図であり、図18は、半導体装置800の一部構成を示す断面図である。これらの図に示すように半導体装置800は、LV(Low Voltage)回路810、第1トランジスタ830及び第2トランジスタ850、シリコン基板871、BOX層872、素子分離領域873、下面絶縁層874、グランド電極875、上面絶縁層876を備える。
図5は、半導体装置100を利用することが可能な、超音波振動子900のインピーダンス整合回路901の回路構成を示す模式図である。
上記のように半導体装置800は、LV回路810、第1トランジスタ830及び第2トランジスタ850を一枚のSOI基板上に形成したものである。SOI基板200のうちBOX層202がないチャネル領域を形成し、そこに第1トランジスタ830及び第2トランジスタ850を形成することにより、第1トランジスタ830及び第2トランジスタ850によってTRスイッチを形成することができ、サージ電荷を逃がしやすくなっている。
半導体装置800の製造方法について説明する。上記のように半導体装置800は、SOI基板200(図3参照)から作成することができ、第1の実施形態に係る半導体装置100と同様に製造することが可能である。
本実施形態に係る半導体装置800は第1の実施形態と同様に、IVUSにおいて超音波振動子のインピーダンス整合回路として利用することができる。インピーダンス整合回路を超音波振動子に一体化させることができるため、IVUSの操作性を向上させることが可能である。また、半導体装置800は、第1の実施形態と同様に、術中超音波プローブ、超音波内視鏡、腹腔鏡手術用把持具及び腹腔鏡手術用手術ロボット等の各種超音波イメージングシステムにおいてインピーダンス整合回路として利用することができる。
結晶シリコンからなるシリコン基板、上記シリコン基板に積層されたBOX(buried oxide)層及び上記BOX層に積層されたSOI(silicon on insulator)層を備えるSOI基板上に形成された、集積回路を備える半導体装置であって、
上記集積回路を構成し、上記シリコン基板と同じ結晶配向を有する半導体領域を備える保護回路と、
上記SOI基板を貫通し、上記保護回路を分離する素子分離領域と
を具備する半導体装置。
上記(1)に記載の半導体装置であって、
上記保護回路は、ダイオードである
半導体装置。
(3)
上記(1)に記載の半導体装置であって、
上記保護回路は、縦型トランジスタである
半導体装置。
上記(1)から(3)のうちいずれか一つに記載の半導体装置であって、
上記素子分離領域は、シリコン酸化物、シリコン窒化物及びポリシリコンのうちいずれか1種又は2種以上からなる
半導体装置。
上記(3)に記載の半導体装置であって、
上記素子分離領域は、上記縦型トランジスタのゲート電極を備える
半導体装置。
上記(1)から(5)のうちいずれか一つに記載の半導体装置であって、
上記SOI基板は、第1の面と、その反対側の第2の面を有し、
上記保護回路は、第1の半導体素子と第2の半導体素子を含み、
上記第1の半導体素子は、上記第1の面側であって第1の不純物型を有する第1の半導体領域と、上記第2の面側であって第2の不純物型を有する第2の半導体領域が積層されて構成され、
上記第2の半導体素子は、上記第1の面側であって上記第2の不純物型を有する第3の半導体領域と、上記第2の面側であって上記第1の不純物型を有する第4の半導体領域が積層されて構成されている
半導体装置。
上記(6)に記載の半導体装置であって
上記半導体装置の上記第1の面に設けられ、上記第1の半導体領域及び上記第3の半導体領域に導通する接地コンタクト構造
をさらに具備する半導体装置。
上記(7)に記載の半導体装置であって
上記接地コンタクト構造は、上記第1の半導体領域と上記第3の半導体領域に接続され、上記第1の半導体領域と上記第3の半導体領域の両者に共通の接地配線を含む
半導体装置。
上記(8)に記載の半導体装置であって
上記接地コンタクト構造は、上記接地配線に接続され、上記第1の半導体領域と上記第3の半導体領域の両者に共通の接地電極を含む
半導体装置。
上記(6)から(9)のうちいずれか一つに記載の半導体装置であって
上記第2の半導体領域と上記第4の半導体領域に接続され、上記第2の半導体領域と上記第4の半導体領域の両者に共通の信号配線
をさらに具備する半導体装置。
結晶シリコンからなるシリコン基板、上記シリコン基板に積層されたBOX層及び上記BOX層に積層されたSOI層を備えるSOI基板上に形成された、集積回路を備える半導体装置であって、上記集積回路を構成し、上記シリコン基板と同じ結晶配向を有する半導体領域を備える保護回路と、上記SOI基板を貫通し、上記保護回路を分離する素子分離領域とを備える半導体装置
を具備する超音波撮像装置。
SOI基板上に集積回路が形成された半導体装置の製造方法であって、
結晶シリコンからなるシリコン基板、上記シリコン基板に積層されたBOX層及び上記BOX層に積層されたSOI層を備えるSOI基板を準備し、
エピタキシャル結晶成長法により、上記シリコン基板上に上記シリコン基板と同じ結晶配向を有する半導体領域を備え、上記集積回路を構成する保護回路を形成し、
上記SOI基板を貫通し、上記保護回路を分離する素子分離領域を形成する
半導体装置の製造方法。
上記(12)に記載の半導体装置の製造方法であって、
上記保護回路を形成する工程では、上記シリコン基板を、上記半導体領域の結晶成長が進行する側の面とは反対側の面から研磨して上記半導体領域を露出させる基板研磨法を用いる
半導体装置の製造方法。
結晶シリコンからなるシリコン基板、上記シリコン基板に積層されたBOX層及び上記BOX層に積層されたSOI層を備えるSOI基板上に形成された、集積回路を備える半導体装置であって、上記集積回路を構成し、上記シリコン基板と同じ結晶配向を有する半導体領域を備える保護回路と、上記SOI基板を貫通し、上記保護回路を分離する素子分離領域とを備える半導体装置を搭載する超音波カテーテルを含む
超音波イメージングシステム。
結晶シリコンからなるシリコン基板、上記シリコン基板に積層されたBOX層及び上記BOX層に積層されたSOI層を備えるSOI基板上に形成された、集積回路を備える半導体装置であって、上記集積回路を構成し、上記シリコン基板と同じ結晶配向を有する半導体領域を備える保護回路と、上記SOI基板を貫通し、上記保護回路を分離する素子分離領域とを備える半導体装置を搭載する術中超音波プローブ又は超音波内視鏡を含む
超音波イメージングシステム。
結晶シリコンからなるシリコン基板、上記シリコン基板に積層されたBOX層及び上記BOX層に積層されたSOI層を備えるSOI基板上に形成された、集積回路を備える半導体装置であって、上記集積回路を構成し、上記シリコン基板と同じ結晶配向を有する半導体領域を備える保護回路と、上記SOI基板を貫通し、上記保護回路を分離する素子分離領域とを備える半導体装置を搭載する、腹腔鏡下手術で用いられる超音波イメージング機能付き手持ち器具を含む
超音波イメージングシステム。
結晶シリコンからなるシリコン基板、上記シリコン基板に積層されたBOX層及び上記BOX層に積層されたSOI層を備えるSOI基板上に形成された、集積回路を備える半導体装置であって、上記集積回路を構成し、上記シリコン基板と同じ結晶配向を有する半導体領域を備える保護回路と、上記SOI基板を貫通し、上記保護回路を分離する素子分離領域とを備える半導体装置を搭載する、腹腔鏡下手術で用いられる超音波イメージング機能付きロボット鉗子を含む
超音波イメージングシステム。
110…LV回路
130…第1ダイオード
150…第2ダイオード
171…シリコン基板
172…BOX層
173…素子分離領域
175…グランド電極
200…SOI基板
201…シリコン基板
202…BOX層
203…SOI層
800…半導体装置
810…LV回路
830…第1トランジスタ
850…第2トランジスタ
871…シリコン基板
872…BOX層
873…素子分離領域
875…グランド電極
Claims (17)
- 結晶シリコンからなるシリコン基板、前記シリコン基板に積層されたBOX(buried oxide)層及び前記BOX層に積層されたSOI(silicon on insulator)層を備えるSOI基板上に形成された、集積回路を備える半導体装置であって、
前記集積回路を構成し、前記シリコン基板と同じ結晶配向を有する半導体領域を備える保護回路と、
前記SOI基板を貫通し、前記保護回路を分離する素子分離領域と
を具備する半導体装置。 - 請求項1に記載の半導体装置であって、
前記保護回路は、ダイオードである
半導体装置。 - 請求項1に記載の半導体装置であって、
前記保護回路は、縦型トランジスタである
半導体装置。 - 請求項1に記載の半導体装置であって、
前記素子分離領域は、シリコン酸化物、シリコン窒化物及びポリシリコンのうちいずれか1種又は2種以上からなる
半導体装置。 - 請求項3に記載の半導体装置であって、
前記素子分離領域は、前記縦型トランジスタのゲート電極を備える
半導体装置。 - 請求項1に記載の半導体装置であって、
前記SOI基板は、第1の面と、その反対側の第2の面を有し、
前記保護回路は、第1の半導体素子と第2の半導体素子を含み、
前記第1の半導体素子は、前記第1の面側であって第1の不純物型を有する第1の半導体領域と、前記第2の面側であって第2の不純物型を有する第2の半導体領域が積層されて構成され、
前記第2の半導体素子は、前記第1の面側であって前記第2の不純物型を有する第3の半導体領域と、前記第2の面側であって前記第1の不純物型を有する第4の半導体領域が積層されて構成されている
半導体装置。 - 請求項6に記載の半導体装置であって、
前記半導体装置の前記第1の面に設けられ、前記第1の半導体領域及び前記第3の半導体領域に導通する接地コンタクト構造
をさらに具備する半導体装置。 - 請求項7に記載の半導体装置であって、
前記接地コンタクト構造は、前記第1の半導体領域と前記第3の半導体領域に接続され、前記第1の半導体領域と前記第3の半導体領域の両者に共通の接地配線を含む
半導体装置。 - 請求項8に記載の半導体装置であって、
前記接地コンタクト構造は、前記接地配線に接続され、前記第1の半導体領域と前記第3の半導体領域の両者に共通の接地電極を含む
半導体装置。 - 請求項6に記載の半導体装置であって、
前記第2の半導体領域と前記第4の半導体領域に接続され、前記第2の半導体領域と前記第4の半導体領域の両者に共通の信号配線
をさらに具備する半導体装置。 - 結晶シリコンからなるシリコン基板、前記シリコン基板に積層されたBOX層及び前記BOX層に積層されたSOI層を備えるSOI基板上に形成された、集積回路を備える半導体装置であって、前記集積回路を構成し、前記シリコン基板と同じ結晶配向を有する半導体領域を備える保護回路と、前記SOI基板を貫通し、前記保護回路を分離する素子分離領域とを備える半導体装置
を具備する超音波撮像装置。 - SOI基板上に集積回路が形成された半導体装置の製造方法であって、
結晶シリコンからなるシリコン基板、前記シリコン基板に積層されたBOX層及び前記BOX層に積層されたSOI層を備えるSOI基板を準備し、
エピタキシャル結晶成長法により、前記シリコン基板上に前記シリコン基板と同じ結晶配向を有する半導体領域を備え、前記集積回路を構成する保護回路を形成し、
前記SOI基板を貫通し、前記保護回路を分離する素子分離領域を形成する
半導体装置の製造方法。 - 請求項12に記載の半導体装置の製造方法であって、
前記保護回路を形成する工程では、前記シリコン基板を、前記半導体領域の結晶成長が進行する側の面とは反対側の面から研磨して前記半導体領域を露出させる基板研磨法を用いる
半導体装置の製造方法。 - 結晶シリコンからなるシリコン基板、前記シリコン基板に積層されたBOX層及び前記BOX層に積層されたSOI層を備えるSOI基板上に形成された、集積回路を備える半導体装置であって、前記集積回路を構成し、前記シリコン基板と同じ結晶配向を有する半導体領域を備える保護回路と、前記SOI基板を貫通し、前記保護回路を分離する素子分離領域とを備える半導体装置を搭載する超音波カテーテルを含む
超音波イメージングシステム。 - 結晶シリコンからなるシリコン基板、前記シリコン基板に積層されたBOX層及び前記BOX層に積層されたSOI層を備えるSOI基板上に形成された、集積回路を備える半導体装置であって、前記集積回路を構成し、前記シリコン基板と同じ結晶配向を有する半導体領域を備える保護回路と、前記SOI基板を貫通し、前記保護回路を分離する素子分離領域とを備える半導体装置を搭載する術中超音波プローブ又は超音波内視鏡を含む
超音波イメージングシステム。 - 結晶シリコンからなるシリコン基板、前記シリコン基板に積層されたBOX層及び前記BOX層に積層されたSOI層を備えるSOI基板上に形成された、集積回路を備える半導体装置であって、前記集積回路を構成し、前記シリコン基板と同じ結晶配向を有する半導体領域を備える保護回路と、前記SOI基板を貫通し、前記保護回路を分離する素子分離領域とを備える半導体装置を搭載する、腹腔鏡下手術で用いられる超音波イメージング機能付き手持ち器具を含む
超音波イメージングシステム。 - 結晶シリコンからなるシリコン基板、前記シリコン基板に積層されたBOX層及び前記BOX層に積層されたSOI層を備えるSOI基板上に形成された、集積回路を備える半導体装置であって、前記集積回路を構成し、前記シリコン基板と同じ結晶配向を有する半導体領域を備える保護回路と、前記SOI基板を貫通し、前記保護回路を分離する素子分離領域とを備える半導体装置を搭載する、腹腔鏡下手術で用いられる超音波イメージング機能付きロボット鉗子を含む
超音波イメージングシステム。
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US (1) | US20180263594A1 (ja) |
JP (1) | JPWO2017056355A1 (ja) |
WO (1) | WO2017056355A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2020017382A1 (ja) * | 2018-07-18 | 2020-01-23 | 株式会社東海理化電機製作所 | 半導体装置 |
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JP7426293B2 (ja) * | 2020-06-16 | 2024-02-01 | 富士フイルムヘルスケア株式会社 | 2次元アレイ超音波探触子および加算回路 |
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JP2008166705A (ja) * | 2006-12-06 | 2008-07-17 | Denso Corp | 半導体装置およびその製造方法 |
JP2009136700A (ja) * | 2001-10-11 | 2009-06-25 | Tyco Healthcare Group Lp | 積層された小さい刃から形成された、長い超音波切断刃 |
JP2010147239A (ja) * | 2008-12-18 | 2010-07-01 | Toshiba Corp | 半導体装置及びその製造方法 |
JP2012176235A (ja) * | 2011-02-25 | 2012-09-13 | General Electric Co <Ge> | 送信回路、超音波プローブ、及び超音波画像表示装置 |
JP2013102136A (ja) * | 2011-10-14 | 2013-05-23 | Elpida Memory Inc | 半導体装置およびその製造方法 |
JP2015515917A (ja) * | 2012-05-11 | 2015-06-04 | ヴォルカノ コーポレイションVolcano Corporation | 回転式血管内超音波(ivus)装置のための回路アーキテクチャー及び電気インターフェイス |
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JPH08102498A (ja) * | 1994-09-30 | 1996-04-16 | Hitachi Ltd | 半導体装置 |
FR2729008B1 (fr) * | 1994-12-30 | 1997-03-21 | Sgs Thomson Microelectronics | Circuit integre de puissance |
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2016
- 2016-07-15 JP JP2017542678A patent/JPWO2017056355A1/ja active Pending
- 2016-07-15 US US15/760,068 patent/US20180263594A1/en not_active Abandoned
- 2016-07-15 WO PCT/JP2016/003366 patent/WO2017056355A1/ja active Application Filing
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JPH0817694A (ja) * | 1994-06-27 | 1996-01-19 | Motorola Inc | 集積回路に適用するための薄膜およびバルク混合半導体基板ならびにその形成方法 |
JP2009136700A (ja) * | 2001-10-11 | 2009-06-25 | Tyco Healthcare Group Lp | 積層された小さい刃から形成された、長い超音波切断刃 |
JP2008166705A (ja) * | 2006-12-06 | 2008-07-17 | Denso Corp | 半導体装置およびその製造方法 |
JP2010147239A (ja) * | 2008-12-18 | 2010-07-01 | Toshiba Corp | 半導体装置及びその製造方法 |
JP2012176235A (ja) * | 2011-02-25 | 2012-09-13 | General Electric Co <Ge> | 送信回路、超音波プローブ、及び超音波画像表示装置 |
JP2013102136A (ja) * | 2011-10-14 | 2013-05-23 | Elpida Memory Inc | 半導体装置およびその製造方法 |
JP2015515917A (ja) * | 2012-05-11 | 2015-06-04 | ヴォルカノ コーポレイションVolcano Corporation | 回転式血管内超音波(ivus)装置のための回路アーキテクチャー及び電気インターフェイス |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020017382A1 (ja) * | 2018-07-18 | 2020-01-23 | 株式会社東海理化電機製作所 | 半導体装置 |
JP2020013900A (ja) * | 2018-07-18 | 2020-01-23 | 株式会社東海理化電機製作所 | 半導体装置 |
JP7074392B2 (ja) | 2018-07-18 | 2022-05-24 | 株式会社東海理化電機製作所 | 半導体装置 |
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JPWO2017056355A1 (ja) | 2018-08-02 |
US20180263594A1 (en) | 2018-09-20 |
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