公开(公告)号：US20050196935A1

公开(公告)日：2005-09-08

申请号：US11108827

申请日：2005-04-19

申请人： Norio Ishitsuka ,  Hideo Miura ,  Shuji Ikeda ,  Norio Suzuki ,  Yasushi Matsuda ,  Yasuko Yoshida ,  Hirohiko Yamamoto ,  Masamichi Kobayashi ,  Akira Takamatsu ,  Hirofumi Shimizu ,  Kazushi Fukuda ,  Shinichi Horibe ,  Toshio Nozoe

发明人： Norio Ishitsuka ,  Hideo Miura ,  Shuji Ikeda ,  Norio Suzuki ,  Yasushi Matsuda ,  Yasuko Yoshida ,  Hirohiko Yamamoto ,  Masamichi Kobayashi ,  Akira Takamatsu ,  Hirofumi Shimizu ,  Kazushi Fukuda ,  Shinichi Horibe ,  Toshio Nozoe

IPC分类号： H01L21/31 ,  H01L21/76 ,  H01L21/762

CPC分类号： H01L21/76232 ,  H01L21/76235 ,  H01L29/78

摘要： A process of producing a semiconductor device having a highly reliable groove isolation structure with a desired radius of curvature formed at the groove upper edge and without formation of any step. The device is produced by reducing the stress generation around the groove upper edge of an element isolation groove on a semiconductor substrate, thereby optimizing the shape of an element isolation groove and making the device finer and improving the device electric characteristics.

公开(公告)号：US06881646B2

公开(公告)日：2005-04-19

申请号：US10392916

申请日：2003-03-21

申请人： Norio Ishitsuka ,  Hideo Miura ,  Shuji Ikeda ,  Norio Suzuki ,  Yasushi Matsuda ,  Yasuko Yoshida ,  Hirohiko Yamamoto ,  Masamichi Kobayashi ,  Akira Takamatsu ,  Hirofumi Shimizu ,  Kazushi Fukuda ,  Shinichi Horibe ,  Toshio Nozoe

发明人： Norio Ishitsuka ,  Hideo Miura ,  Shuji Ikeda ,  Norio Suzuki ,  Yasushi Matsuda ,  Yasuko Yoshida ,  Hirohiko Yamamoto ,  Masamichi Kobayashi ,  Akira Takamatsu ,  Hirofumi Shimizu ,  Kazushi Fukuda ,  Shinichi Horibe ,  Toshio Nozoe

IPC分类号： H01L21/31 ,  H01L21/76 ,  H01L21/762

CPC分类号： H01L21/76232 ,  H01L21/76235 ,  H01L29/78

摘要： A process of producing a semiconductor device having a highly reliable groove isolation structure with a desired radius of curvature formed at the groove upper edge and without formation of any step. The device is produced by reducing the stress generation around the groove upper edge of an element isolation groove on a semiconductor substrate, thereby optimizing the shape of an element isolation groove and making the device finer and improving the device electric characteristics.

摘要翻译： 一种制造半导体器件的方法，该半导体器件具有高度可靠的凹槽隔离结构，其具有在凹槽上边缘处形成的所需曲率半径，并且不形成任何步骤。 通过减小半导体衬底上的元件隔离槽的槽上边缘周围的应力产生，从而优化元件隔离槽的形状并使器件更精细并提高器件电气特性来制造器件。

公开(公告)号：US06559027B2

公开(公告)日：2003-05-06

申请号：US09845338

申请日：2001-05-01

申请人： Norio Ishitsuka ,  Hideo Miura ,  Shuji Ikeda ,  Norio Suzuki ,  Yasushi Matsuda ,  Yasuko Yoshida ,  Hirohiko Yamamoto ,  Masamichi Kobayashi ,  Akira Takamatsu ,  Hirofumi Shimizu ,  Kazushi Fukuda ,  Shinichi Horibe ,  Toshio Nozoe

发明人： Norio Ishitsuka ,  Hideo Miura ,  Shuji Ikeda ,  Norio Suzuki ,  Yasushi Matsuda ,  Yasuko Yoshida ,  Hirohiko Yamamoto ,  Masamichi Kobayashi ,  Akira Takamatsu ,  Hirofumi Shimizu ,  Kazushi Fukuda ,  Shinichi Horibe ,  Toshio Nozoe

IPC分类号： H01L2176

CPC分类号： H01L21/76232 ,  H01L21/76235 ,  H01L29/78

摘要： A semiconductor device having a highly reliable groove isolation structure with a desired radius of curvature formed at the groove upper edge and without formation of any step, there is produced by reducing the stress generation around the groove upper edge of an element isolation groove on a semiconductor substrate, thereby optimizing the shape of an element isolation groove and making the device finer and improving the device electric characteristics.

摘要翻译： 一种半导体器件，其具有高度可靠的凹槽隔离结构，其具有在凹槽上边缘处形成的所需曲率半径，并且不形成任何步骤，通过减小半导体上的元件隔离槽的沟槽上边缘周围的应力产生而产生 从而优化元件隔离槽的形状并使器件更精细并提高器件的电气特性。

公开(公告)号：US07402473B2

公开(公告)日：2008-07-22

申请号：US11108827

申请日：2005-04-19

申请人： Norio Ishitsuka ,  Hideo Miura ,  Shuji Ikeda ,  Norio Suzuki ,  Yasushi Matsuda ,  Yasuko Yoshida ,  Hirohiko Yamamoto ,  Masamichi Kobayashi ,  Akira Takamatsu ,  Hirofumi Shimizu ,  Kazushi Fukuda ,  Shinichi Horibe ,  Toshio Nozoe

发明人： Norio Ishitsuka ,  Hideo Miura ,  Shuji Ikeda ,  Norio Suzuki ,  Yasushi Matsuda ,  Yasuko Yoshida ,  Hirohiko Yamamoto ,  Masamichi Kobayashi ,  Akira Takamatsu ,  Hirofumi Shimizu ,  Kazushi Fukuda ,  Shinichi Horibe ,  Toshio Nozoe

IPC分类号： H01L21/336 ,  H01L21/76

CPC分类号： H01L21/76232 ,  H01L21/76235 ,  H01L29/78

摘要： A process of producing a semiconductor device having a highly reliable groove isolation structure with a desired radius of curvature formed at the groove upper edge and without formation of any step. The device is produced by reducing the stress generation around the groove upper edge of an element isolation groove on a semiconductor substrate, thereby optimizing the shape of an element isolation groove and making the device finer and improving the device electric characteristics.

摘要翻译： 一种制造半导体器件的方法，该半导体器件具有高度可靠的凹槽隔离结构，其具有在凹槽上边缘处形成的所需曲率半径，并且不形成任何步骤。 通过减小半导体基板上的元件隔离槽的槽上缘周围的应力产生，从而优化元件隔离槽的形状并使器件更细，并提高器件电特性来制造器件。

公开(公告)号：US06242323B1

公开(公告)日：2001-06-05

申请号：US09367524

申请日：1999-08-16

申请人： Norio Ishitsuka ,  Hideo Miura ,  Shuji Ikeda ,  Norio Suzuki ,  Yasushi Matsuda ,  Yasuko Yoshida ,  Hirohiko Yamamoto ,  Masamichi Kobayashi ,  Akira Takamatsu ,  Hirofumi Shimizu ,  Kazushi Fukuda ,  Shinichi Horibe ,  Toshio Nozoe

发明人： Norio Ishitsuka ,  Hideo Miura ,  Shuji Ikeda ,  Norio Suzuki ,  Yasushi Matsuda ,  Yasuko Yoshida ,  Hirohiko Yamamoto ,  Masamichi Kobayashi ,  Akira Takamatsu ,  Hirofumi Shimizu ,  Kazushi Fukuda ,  Shinichi Horibe ,  Toshio Nozoe

IPC分类号： H01L2176

CPC分类号： H01L21/76232 ,  H01L21/76235 ,  H01L29/78

摘要： A semiconductor device having a highly reliable groove isolation structure with a desired radius of curvature formed at the groove upper edge and without formation of any step, there is produced by reducing the stress generation around the groove upper edge of an element isolation groove on a semiconductor substrate, thereby optimizing the shape of an element isolation groove and making the device finer and improving the device electric characteristics.

摘要翻译： 一种半导体器件，其具有高度可靠的凹槽隔离结构，其具有在凹槽上边缘处形成的所需曲率半径，并且不形成任何步骤，通过减小半导体上的元件隔离槽的沟槽上边缘周围的应力产生而产生 从而优化元件隔离槽的形状并使器件更精细并提高器件的电气特性。

公开(公告)号：US6057241A

公开(公告)日：2000-05-02

申请号：US66757

申请日：1998-04-27

申请人： Yasushi Matsuda ,  Hideo Miura ,  Hirohiko Yamamoto ,  Masamichi Kobayashi ,  Shuji Ikeda ,  Akira Takamatsu ,  Norio Suzuki ,  Hirofumi Shimizu ,  Yasuko Yoshida ,  Kazushi Fukuda ,  Shinichi Horibe ,  Toshio Nozoe

发明人： Yasushi Matsuda ,  Hideo Miura ,  Hirohiko Yamamoto ,  Masamichi Kobayashi ,  Shuji Ikeda ,  Akira Takamatsu ,  Norio Suzuki ,  Hirofumi Shimizu ,  Yasuko Yoshida ,  Kazushi Fukuda ,  Shinichi Horibe ,  Toshio Nozoe

IPC分类号： H01L21/76 ,  H01L21/477

CPC分类号： H01L21/477 ,  H01L21/76

摘要： A silicon oxide film 2 which is exposed from a side wall of a groove 4a is etched to displace the silicon oxide film 2 backward toward an active region. The displacement amount is set to be equal to or more than a film thickness (Tr) of a silicon oxide film 5 to be formed on an inner wall of the groove 4a in a later thermal oxidation step and equal to or less than twice the film thickness (Tr) thereof. A shoulder portion of the groove 4a can be rounded by a low-temperature heat treatment at 1000.degree. C. or less, by controlling a heat treatment period such that the film thickness (Tr) of the silicon oxide film 5 is more than the film thickness (Tp) of the silicon oxide film 2 and equal to or less than three times the film thickness (Tr) thereof (Tp

摘要翻译： 蚀刻从槽4a的侧壁露出的氧化硅膜2，使氧化硅膜2朝向有源区域反向移动。 位移量被设定为等于或大于在随后的热氧化步骤中形成在凹槽4a的内壁上的氧化硅膜5的膜厚度（Tr），并且等于或小于两倍的膜 厚度（Tr）。 通过控制热处理时间使得氧化硅膜5的膜厚（Tr）大于膜的厚度（Tr），可以通过在1000℃以下的低温热处理使槽4a的肩部成圆形 氧化硅膜2的厚度（Tp）等于或小于其厚度（Tr）的三倍（Tp

公开(公告)号：US6090684A

公开(公告)日：2000-07-18

申请号：US363184

申请日：1999-07-29

申请人： Norio Ishitsuka ,  Hideo Miura ,  Shuji Ikeda ,  Yasuko Yoshida ,  Norio Suzuki ,  Masayuki Kojima ,  Kota Funayama

发明人： Norio Ishitsuka ,  Hideo Miura ,  Shuji Ikeda ,  Yasuko Yoshida ,  Norio Suzuki ,  Masayuki Kojima ,  Kota Funayama

IPC分类号： H01L21/76 ,  H01L21/762 ,  H01L29/78

CPC分类号： H01L21/76232 ,  Y10S148/05

摘要： A shallow groove isolation structure (SGI) electrically insulates adjoining transistors on a semiconductor substrate. A pad oxide film is formed on the semiconductor substrate and an oxidation inhibition film is formed on the pad oxide film. Parts of the oxide inhibition film and pad oxide film are removed to form the groove. In particular, the pad oxide film is removed from an upper edge of the groove within a range of 5 to 40 nm. A region of the groove is oxidized in an oxidation environment with a cast ratio of hydrogen (H.sub.2) to oxygen (O.sub.2) being less than or equal to 0.5. At this ratio, the oxidizing progresses under low stress at the upper groove edges of the substrate thereby enabling rounding of the upper groove edges without creating a level difference at or near the upper groove edge on the substrate surface.

摘要翻译： 浅沟隔离结构（SGI）使半导体衬底上的相邻晶体管电绝缘。 在半导体基板上形成衬垫氧化膜，在衬垫氧化膜上形成氧化抑制膜。 除去氧化物抑制膜和垫氧化膜的一部分以形成槽。 特别地，在5〜40nm的范围内，从槽的上边缘去除衬垫氧化膜。 凹槽的区域在氢（H 2）与氧（O 2）的铸造比小于或等于0.5的氧化环境中被氧化。 在该比例下，在基板的上槽边缘处的低应力下氧化进行，从而能够在上槽边缘的四舍五入，而不会在基板表面上的上槽边缘处或附近产生水平差。

公开(公告)号：US06858515B2

公开(公告)日：2005-02-22

申请号：US10638485

申请日：2003-08-12

申请人： Norio Ishitsuka ,  Hideo Miura ,  Shuji Ikeda ,  Yasuko Yoshida ,  Norio Suzuki ,  Kozo Watanabe ,  Kenji Kanamitsu

发明人： Norio Ishitsuka ,  Hideo Miura ,  Shuji Ikeda ,  Yasuko Yoshida ,  Norio Suzuki ,  Kozo Watanabe ,  Kenji Kanamitsu

IPC分类号： H01L21/76 ,  H01L21/316 ,  H01L21/762 ,  H01L29/06

CPC分类号： H01L21/76232 ,  H01L29/0657

摘要： A semiconductor device free from electric failure in transistors at upper trench edges can be produced by a simplified process comprising basic steps of forming a pad oxide film on the circuit-forming side of a semiconductor substrate; forming an oxidation prevention film on the pad oxide film; removing the oxidation presention film and the pad oxide film at a desired position, thereby exposing the surface of the semiconductor substrate; horizontally recessing the pad oxide film, etching the exposed surface of the semiconductor substrate by isotropic etching; forming a trench to a desired depth, using the oxidation prevention film as a mask; horizontally recessing the pad oxide film; oxidizing the trench formed in the semiconductor substrate; embedding an embedding isolation film in the oxidized trench; removing the embedding isolation film formed on the oxidation prevention film; removing the oxidation prevention film formed on the circuit-forming side of the semiconductor substrate; and removing the pad oxide film formed on the circuit-forming side of the semiconductor substrate, where round upper trench edges with a curvature can be obtained, if necessary, by conducting isotropic etching of exposed surface of the semiconductor substrate and horizontally recessing of the pad oxide film before the oxidation of the trench, whereby only one oxidation step is required.

摘要翻译： 在上沟槽边缘处的晶体管中没有电故障的半导体器件可以通过简化的工艺制造，包括在半导体衬底的电路形成侧形成衬垫氧化膜的基本步骤; 在衬垫氧化膜上形成氧化防止膜; 在期望的位置除去氧化呈现膜和衬垫氧化膜，从而暴露半导体衬底的表面; 水平地凹陷衬垫氧化膜，通过各向同性蚀刻蚀刻半导体衬底的暴露表面; 使用氧化防止膜作为掩模，形成期望深度的沟槽; 使衬垫氧化膜水平地凹陷; 氧化在半导体衬底中形成的沟槽; 在氧化沟槽中嵌入嵌入隔离膜; 去除形成在防氧化膜上的嵌入隔离膜; 去除形成在半导体衬底的电路形成侧的氧化防止膜; 以及去除形成在半导体衬底的电路形成侧的衬垫氧化膜，其中如果需要，可以获得具有曲率的圆形上沟槽边缘，通过对半导体衬底的暴露表面进行各向同性蚀刻并且使衬垫的水平凹陷 氧化膜在沟槽氧化之前，因此只需要一个氧化步骤。

公开(公告)号：US06635945B1

公开(公告)日：2003-10-21

申请号：US09580953

申请日：2000-05-30

申请人： Norio Ishitsuka ,  Hideo Miura ,  Shuji Ikeda ,  Yasuko Yoshida ,  Norio Suzuki ,  Kozo Watanabe ,  Kenji Kanamitsu

发明人： Norio Ishitsuka ,  Hideo Miura ,  Shuji Ikeda ,  Yasuko Yoshida ,  Norio Suzuki ,  Kozo Watanabe ,  Kenji Kanamitsu

IPC分类号： H01L2900

CPC分类号： H01L21/76232 ,  H01L29/0657

摘要： A semiconductor device and process of forming the device are described. The process includes forming a pad oxide film on the circuit-forming side of a semiconductor substrate; forming an oxidation prevention film on the pad oxide film; removing the oxidation prevention film and the pad oxide film at a desired position, thereby exposing the surface of the semiconductor substrate; horizontally recessing the pad oxide film; etching the exposed surface of the semiconductor substrate by isotropic etching; forming a trench to a desired depth, using the oxidation prevention film as a mask; horizontally recessing the pad oxide film; and oxidizing the trench formed in the semiconductor substrate. The produced device has round upper trench edges obtained by conducting isotropic etching of the exposed surface of the semiconductor substrate and horizontally recessing of the pad oxide film before the oxidation of the trench, whereby only one oxidation step is required.

摘要翻译： 描述半导体器件和形成器件的工艺。 该工艺包括在半导体衬底的电路形成侧上形成衬垫氧化膜; 在衬垫氧化膜上形成氧化防止膜; 在期望的位置除去氧化防止膜和焊盘氧化膜，从而暴露半导体衬底的表面; 使衬垫氧化膜水平地凹陷; 通过各向同性蚀刻蚀刻半导体衬底的暴露表面; 使用氧化防止膜作为掩模，形成期望深度的沟槽; 使衬垫氧化膜水平地凹陷; 以及氧化在半导体衬底中形成的沟槽。 所制造的器件具有圆形的上沟槽边缘，其通过对半导体衬底的暴露表面进行各向同性蚀刻并在沟槽氧化之前水平凹陷焊盘氧化膜而获得，由此仅需要一个氧化步骤。

公开(公告)号：US06326255B1

公开(公告)日：2001-12-04

申请号：US09675053

申请日：2000-09-29

申请人： Norio Ishitsuka ,  Hideo Miura ,  Shuji Ikeda ,  Yasuko Yoshida ,  Norio Suzuki ,  Michimasa Funabashi

发明人： Norio Ishitsuka ,  Hideo Miura ,  Shuji Ikeda ,  Yasuko Yoshida ,  Norio Suzuki ,  Michimasa Funabashi

IPC分类号： H01L2126

CPC分类号： H01L21/76224 ,  Y10S438/978

摘要： A method for manufacturing a semiconductor device includes the steps of (1) forming a pad oxide film of 5 nm or more on a circuit forming surface of a semiconductor substrate; (2) forming an oxidation inhibition film on the pad oxide film; (3) forming grooves of a given depth with the oxidation inhibition film as a mask; (4) receding the pad oxide film; (5) oxidizing the grooves formed on the semiconductor substrate in the range of 0

摘要翻译： 一种制造半导体器件的方法包括以下步骤：（1）在半导体衬底的电路形成表面上形成5nm以上的衬垫氧化膜; （2）在衬垫氧化膜上形成氧化抑制膜; （3）以氧化抑制膜为掩模形成给定深度的槽; （4）后退衬垫氧化膜; （5）在氧化气氛为干燥氧化（H2 /O2≈0）的0℃<0.88t-924的范围内对形成在半导体衬底上的沟槽进行氧化，对应于空气中的氧气分压 氧分压比为C％，氧化温度为t（℃）; （6）在氧化槽内埋入绝缘膜; （7）除去形成在氧化抑制膜上的埋置绝缘膜; （8）除去形成在半导体衬底的电路形成表面上的氧化抑制膜; 和（9）去除形成在所述半导体衬底的电路形成表面上的衬垫氧化膜。