公开(公告)号：USRE38907E1

公开(公告)日：2005-12-06

申请号：US10452203

申请日：2003-06-02

申请人： Tomoko Matsudai ,  Tsutomu Kojima ,  Akio Nakagawa

发明人： Tomoko Matsudai ,  Tsutomu Kojima ,  Akio Nakagawa

IPC分类号： H03K5/22 ,  H03K5/24 ,  H03K17/082 ,  H03K17/10 ,  H03K17/14

CPC分类号： H03K17/102 ,  H03K5/2481 ,  H03K17/0828 ,  H03K17/145

摘要： The differential amplifier of a comparator circuit includes first and second n-type MOSFETs for receiving an input signal, first and second p-type MOSFETs of a current mirror circuit, and a third n-type MOSFET of a current source circuit. The output stage includes a third p-type MOSFET for transmitting a signal, and a fourth n-type MOSFET of the current source circuit. The differential amplifier further includes fifth and sixth n-type MOSFETs respectively series-connected to the first and second n-type MOSFETs. The output stage further includes a seventh n-type MOSFET series-connected to the fourth n-type MOSFET. The gates of the fifth, sixth, and seventh n-type MOSFETs are connected to voltage bias circuits. The fifth, sixth, and seventh n-type MOSFETs suppress variations in voltage at an output node caused by poor saturation characteristics of the first, second, and fourth main n-type MOSFETs.

摘要翻译： 比较器电路的差分放大器包括用于接收输入信号的第一和第二n型MOSFET，电流镜电路的第一和第二p型MOSFET以及电流源电路的第三n型MOSFET。 输出级包括用于传输信号的第三p型MOSFET和电流源电路的第四n型MOSFET。 差分放大器还包括分别串联连接到第一和第二n型MOSFET的第五和第六n型MOSFET。 输出级还包括与第四n型MOSFET串联连接的第七n型MOSFET。 第五，第六和第七n型MOSFET的栅极连接到电压偏置电路。 第五，第六和第七n型MOSFET抑制由于第一，第二和第四主n型MOSFET的饱和特性不良引起的输出节点的电压变化。

公开(公告)号：US06683343B2

公开(公告)日：2004-01-27

申请号：US10084051

申请日：2002-02-28

申请人： Tomoko Matsudai ,  Akio Nakagawa

发明人： Tomoko Matsudai ,  Akio Nakagawa

IPC分类号： H01L2976

CPC分类号： H01L29/66333 ,  H01L29/66348 ,  H01L29/7397

摘要： In an IGBT, an n buffer layer is formed under an n− high resistance layer in which a MOS gate structure is formed. An n+ buffer layer is formed between the n buffer layer and a p+ drain layer. Since the p+ drain layer is doped at a low dose, the efficiency of carrier injection can be reduced and a high-speed operation is possible without lifetime control. Since no lifetime control is performed, the on-state voltage can be low. Since the n buffer layer does not immediately stop the extension of the depletion layer during a turn-off period, oscillation of the current and voltage is prevented. The n+ buffer layer maintains a sufficient withstand voltage when a reverse bias is applied.

摘要翻译： 在IGBT中，n型缓冲层形成在形成有MOS栅极结构的n +高电阻层的下方。 在n缓冲层和p +漏极层之间形成n + +缓冲层。 由于p +漏极层以低剂量掺杂，所以可以降低载流子注入的效率，并且可以在没有寿命的情况下进行高速操作。 由于不进行寿命控制，因此导通电压可以低。 由于n缓冲层在关断期间不会立即停止耗尽层的延伸，所以防止了电流和电压的振荡。 当施加反向偏压时，n + +缓冲层保持足够的耐受电压。

公开(公告)号：US07034357B2

公开(公告)日：2006-04-25

申请号：US10724825

申请日：2003-12-02

申请人： Tomoko Matsudai ,  Akio Nakagawa

发明人： Tomoko Matsudai ,  Akio Nakagawa

IPC分类号： H01L29/76 ,  H01L29/94 ,  H01L31/062 ,  H01L31/113 ,  H01L31/119

CPC分类号： H01L29/1095 ,  H01L29/7397

摘要： An insulated gate semiconductor device includes a first base layer of a first conduction type; a second base layer of a second conduction type formed on a first surface of the first base layer; a source layer of the first conduction type selectively formed in a surface region of the second base layer; a drain layer of the second conduction type formed on a second surface of the first base layer opposite from said first surface; and a gate electrode insulated from the source layer, the first base layer and the second base layer and forming in the second base layer a channel electrically connecting between the source layer and the first base layer, wherein the voltage transiently applied to the device is larger than the static breakdown voltage between the source and the drain when a rated current is turned off under a condition, in which condition the device is connected to an inductance load without using a protective circuit.

摘要翻译： 绝缘栅半导体器件包括第一导电类型的第一基极层; 形成在所述第一基底层的第一表面上的第二导电类型的第二基底层; 选择性地形成在所述第二基底层的表面区域中的所述第一导电型的源极层; 所述第二导电类型的漏极层形成在所述第一基底层的与所述第一表面相对的第二表面上; 以及与所述源极层，所述第一基极层和所述第二基极层绝缘的栅电极，并且在所述第二基极层中形成电连接所述源极层与所述第一基极层之间的沟道，其中瞬时施加到所述器件的电压较大 比在额定电流在条件下关闭时在源极和漏极之间的静态击穿电压，在该条件下，器件在不使用保护电路的情况下连接到电感负载。

公开(公告)号：US06620653B2

公开(公告)日：2003-09-16

申请号：US09961361

申请日：2001-09-25

申请人： Tomoko Matsudai ,  Hidetaka Hattori ,  Akio Nakagawa

发明人： Tomoko Matsudai ,  Hidetaka Hattori ,  Akio Nakagawa

IPC分类号： H01L21332

CPC分类号： H01L29/7395 ,  H01L27/0623 ,  H01L27/1203 ,  H01L29/0834 ,  H01L29/0847 ,  H01L29/1095 ,  H01L29/42368 ,  H01L29/42376 ,  H01L29/66333

摘要： A negative buffer layer and a positive collector layer are formed on a side of one surface of a semiconductor substrate. The positive collector layer is set to have a low dose amount and set shallow so that a low injection efficiency emitter structure is realized. Break down voltage of a power device is controlled by a thickness of a drift layer. A positive base layer, a negative emitter layer and a positive base contact layer are formed on a side of the other surface of the semiconductor substrate. A negative low resistant layer reduces a junction FET effect. An emitter electrode comes into contact with the negative emitter layer and the positive base contact layer. A collector electrode comes into contact with the positive collector layer. A gate electrode is formed on a gate insulating film above a channel region on a surface portion of the positive base layer.

摘要翻译： 在半导体衬底的一个表面的一侧上形成负极缓冲层和正极集电极层。 正极集电极层被设定为具有低剂量并且设置得较浅，从而实现了低注入效率的发射极结构。 功率器件的击穿电压由漂移层的厚度控制。 在半导体基板的另一个表面的一侧上形成正基极层，负极发射极层和正极基极接触层。 负极低电阻层降低结FET影响。 发射极电极与负极发射极层和正极基极接触层接触。 集电极与正极集电极层接触。 栅极电极形成在阳极基极层的表面部分上的沟道区域上方的栅极绝缘膜上。

公开(公告)号：US5920087A

公开(公告)日：1999-07-06

申请号：US970103

申请日：1997-11-13

申请人： Akio Nakagawa ,  Tomoko Matsudai ,  Hideyuki Funaki

发明人： Akio Nakagawa ,  Tomoko Matsudai ,  Hideyuki Funaki

IPC分类号： H01L21/331 ,  H01L29/06 ,  H01L29/739 ,  H01L29/74 ,  H01L27/01 ,  H01L31/111

CPC分类号： H01L29/66325 ,  H01L29/0696 ,  H01L29/7394 ,  H01L29/7398

摘要： A sub-gate electrode is arranged to face, through a gate insulating film, a surface of a first p-type base layer which is interposed between a first n-type source layer and an n-type drift layer, and a surface of a second p-type base layer which is interposed between a second n-type source layer and the n-type drift layer and faces the first p-type base layer. A main gate electrode is arranged to face, through a gate insulating film, a surface of the second p-type base layer which is interposed between the second n-type source layer and the n-type drift layer and does not face the first p-type base layer. Three n-type MOSFETs are constructed such that one n-type channel is to be formed in the first p-type base layer and two n-type channels are to be formed in the second p-type base layer. The three channels are to be formed, so that the channel width is effectively enlarged and the current density is increased. The second p-type base layer has a length of 10 .mu.m or less in the drifting direction.

摘要翻译： 子栅电极配置成通过栅极绝缘膜与介于第一n型源极层和n型漂移层之间的第一p型基极层的表面和 第二p型基极层，其介于第二n型源极层和n型漂移层之间并且面向第一p型基极层。 主栅极布置成通过栅极绝缘膜面对介于第二n型源极层和n型漂移层之间的第二p型基极层的表面，并且不面向第一p 型基层。 构造三个n型MOSFET，使得在第一p型基极层中形成一个n型沟道，并且在第二p型基极层中形成两个n型沟道。 要形成三个通道，从而有效地扩大通道宽度，增加电流密度。 第二p型基层在漂移方向上的长度为10μm以下。

公开(公告)号：US5796125A

公开(公告)日：1998-08-18

申请号：US528570

申请日：1995-09-15

申请人： Tomoko Matsudai ,  Mitsuhiko Kitagawa ,  Akio Nakagawa

发明人： Tomoko Matsudai ,  Mitsuhiko Kitagawa ,  Akio Nakagawa

IPC分类号： H01L29/06 ,  H01L29/423 ,  H01L29/739 ,  H01L29/78 ,  H01L29/74 ,  H01L29/76 ,  H01L29/94 ,  H01L31/111

CPC分类号： H01L29/0696 ,  H01L29/7394 ,  H01L29/7398 ,  H01L29/7809 ,  H01L29/7824 ,  H01L29/4238

摘要： A high breakdown voltage semiconductor device. The device includes a semiconductor substrate, an insulating film formed on the semiconductor substrate, an active region formed on the insulating film, drain and base regions formed in a surface portion of the active region, and a source region formed in a surface portion of the base region. First and second gate insulating films are formed on inner surfaces of first and second grooves penetrating the base region so as to come in contact with the source region and reaching the active region, with first and second electrodes being buried in the first and second grooves. Two or more channel regions are formed in a MOS structure constructed by the gate insulating film, the gate electrode, the source region, the base region and the active region.

摘要翻译： 高耐压半导体器件。 该器件包括半导体衬底，形成在半导体衬底上的绝缘膜，形成在绝缘膜上的有源区，形成在有源区的表面部分中的漏极和基极区以及形成在有源区的表面部分中的源极区 基地区。 第一和第二栅极绝缘膜形成在穿过基极区域的第一和第二沟槽的内表面上，以便与源极区域接触并到达有源区域，第一和第二电极被埋在第一和第二沟槽中。 由栅极绝缘膜，栅极电极，源极区域，基极区域和有源区域构成的MOS结构中形成有两个以上的沟道区域。

公开(公告)号：US5731603A

公开(公告)日：1998-03-24

申请号：US701500

申请日：1996-08-22

申请人： Akio Nakagawa ,  Tomoko Matsudai ,  Hideyuki Funaki

发明人： Akio Nakagawa ,  Tomoko Matsudai ,  Hideyuki Funaki

IPC分类号： H01L21/331 ,  H01L29/06 ,  H01L29/739 ,  H01L29/74 ,  H01L27/01 ,  H01L31/111

CPC分类号： H01L29/66325 ,  H01L29/0696 ,  H01L29/7394 ,  H01L29/7398

摘要： A sub-gate electrode is arranged to face, through a gate insulating film, a surface of a first p-type base layer which is interposed between a first n-type source layer and an n-type drift layer, and a surface of a second p-type base layer which is interposed between a second n-type source layer and the n-type drift layer and faces the first p-type base layer. A main gate electrode is arranged to face, through a gate insulating film, a surface of the second p-type base layer which is interposed between the second n-type source layer and the n-type drift layer and does not face the first p-type base layer. Three n-type MOSFETs are constructed such that one n-type channel is to be formed in the first p-type base layer and two n-type channels are to be formed in the second p-type base layer. The three channels are to be formed, so that the channel width is effectively enlarged and the current density is increased. The second p-type base layer has a length of 10 .mu.m or less in the drifting direction.

公开(公告)号：US20050098845A1

公开(公告)日：2005-05-12

申请号：US10959201

申请日：2004-10-07

申请人： Tomoko Matsudai ,  Kazutoshi Nakamura ,  Akio Nakagawa

发明人： Tomoko Matsudai ,  Kazutoshi Nakamura ,  Akio Nakagawa

IPC分类号： H01L29/872 ,  H01L21/8234 ,  H01L27/06 ,  H01L27/07 ,  H01L29/47 ,  H01L29/76

CPC分类号： H01L27/0727

摘要： A MOS field-effect transistor includes a semiconductor substrate of a first-conductivity type, a semiconductor layer of the first-conductivity type, a source region of a second-conductivity type, a first drain region of the second-conductivity type, a resurf layer of the second-conductivity type provided in the surface of the semiconductor layer between the source region and the first drain region in contact with the first drain region, and having a lower impurity concentration than the first drain region, a gate insulation film, and a gate electrode provided on the gate insulation film between the source region and resurf layer. A Schottky barrier diode includes a second drain region of the second-conductivity type provided in the surface of the semiconductor layer separate from the first drain region in a direction away from the gate electrode, and a Schottky electrode provided on the semiconductor layer between the first and second drain regions.

摘要翻译： MOS场效应晶体管包括第一导电类型的半导体衬底，第一导电类型的半导体层，第二导电类型的源极区域，第二导电类型的第一漏极区域，第二导电类型的半导体层， 所述第二导电型层设置在与所述第一漏极区域接触的所述源极区域和所述第一漏极区域之间的所述半导体层的表面中，并且具有比所述第一漏极区域低的杂质浓度，栅极绝缘膜和 栅电极，设置在源极区域和复合层之间的栅极绝缘膜上。 肖特基势垒二极管包括设置在半导体层的表面上的第二导电类型的第二漏极区域，该第二漏极区域在远离栅极电极的方向上与第一漏极区域分开，以及肖特基电极，设置在第一 和第二漏区。

公开(公告)号：US06686613B2

公开(公告)日：2004-02-03

申请号：US10383515

申请日：2003-03-10

申请人： Tomoko Matsudai ,  Hidetaka Hattori ,  Akio Nakagawa

发明人： Tomoko Matsudai ,  Hidetaka Hattori ,  Akio Nakagawa

IPC分类号： H01L29423

CPC分类号： H01L29/7395 ,  H01L27/0623 ,  H01L27/1203 ,  H01L29/0834 ,  H01L29/0847 ,  H01L29/1095 ,  H01L29/42368 ,  H01L29/42376 ,  H01L29/66333

摘要： A negative buffer layer and a positive collector layer are formed on a side of one surface of a semiconductor substrate. The positive collector layer is set to have a low dose amount and set shallow so that a low injection efficiency emitter structure is realized. Break down voltage of a power device is controlled by a thickness of a drift layer. A positive base layer, a negative emitter layer and a positive base contact layer are formed on a side of the other surface of the semiconductor substrate. A negative low resistant layer reduces a junction FET effect. An emitter electrode comes into contact with the negative emitter layer and the positive base contact layer. A collector electrode comes into contact with the positive collector layer. A gate electrode is formed on a gate insulating film above a channel region on a surface portion of the positive base layer.

摘要翻译： 在半导体衬底的一个表面的一侧上形成负极缓冲层和正极集电极层。 正极集电极层被设定为具有低剂量并且设置得较浅，从而实现了低注入效率的发射极结构。 功率器件的击穿电压由漂移层的厚度控制。 在半导体基板的另一个表面的一侧上形成正基极层，负极发射极层和正极基极接触层。 负极低电阻层降低结FET影响。 发射极电极与负极发射极层和正极基极接触层接触。 集电极与正极集电极层接触。 栅极电极形成在阳极基极层的表面部分上的沟道区域上方的栅极绝缘膜上。

公开(公告)号：US06617641B2

公开(公告)日：2003-09-09

申请号：US10059186

申请日：2002-01-31

申请人： Akio Nakagawa ,  Tomoko Matsudai

发明人： Akio Nakagawa ,  Tomoko Matsudai

IPC分类号： H01L2976

CPC分类号： H01L29/0834 ,  H01L29/7397

摘要： An IGBT has a punch-through structure including an n+ buffer layer. It includes a p− low concentration layer formed between the n+ buffer layer and a p+ drain layer. Owing to the low concentration layer, the drain current decreases to zero gradually, not rapidly, when the IGBT is turned off.

摘要翻译： IGBT具有包括n +缓冲层的穿透结构。 它包括形成在n +缓冲层和p +漏极层之间的p-低浓度层。 由于低浓度层，当IGBT关断时，漏极电流逐渐降低到零，而不会迅速降低。