JPS6465862A - Semiconductor device and manufacture thereof - Google Patents
Semiconductor device and manufacture thereofInfo
- Publication number
- JPS6465862A JPS6465862A JP62223250A JP22325087A JPS6465862A JP S6465862 A JPS6465862 A JP S6465862A JP 62223250 A JP62223250 A JP 62223250A JP 22325087 A JP22325087 A JP 22325087A JP S6465862 A JPS6465862 A JP S6465862A
- Authority
- JP
- Japan
- Prior art keywords
- groove
- film
- sio2 film
- diameter
- etching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B12/00—Dynamic random access memory [DRAM] devices
- H10B12/30—DRAM devices comprising one-transistor - one-capacitor [1T-1C] memory cells
- H10B12/37—DRAM devices comprising one-transistor - one-capacitor [1T-1C] memory cells the capacitor being at least partially in a trench in the substrate
Landscapes
- Semiconductor Integrated Circuits (AREA)
- Semiconductor Memories (AREA)
Abstract
PURPOSE:To obtain a groove-type capacitor large enough in capacitance without providing a deep groove by a method wherein a groove is provided, whose diameter in the direction of its depth is larger than the diameter of its opening. CONSTITUTION:A SiO2 film 3 is bored applying a resist mask 4 and a groove 5 is made through a RIE. An SiO2 film 6 and a CVD SiN film 7 are laminated on the inner wall. Resist is buried in the groove 5 and subjected to development controlling the exposure to light rays so as to leave a resist 8 at a lower part. The upper parts of the SiO2 film 6 and the Si3N4 film 7 are removed through etching and then coated with a SiO2 film 3'. A SiO2 film 6' and a Si3N4 film 7' left as the lower part are made to be removed through etching to expose a substrate 1. Next, a trench groove 5' can be obtained through an isotropic etching, whose inner diameter l2 is larger than its diameter l1 at the opening. The inner wall 5' is coated with a SiO2 film 3''', and then a poly-Si layer 9, an insulating film, and a poly-Si opposed electrode layer 11 are formed. By this constitution, a groovetype capacitor large in capacitance can be obtained without making the groove deep.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62223250A JP2534273B2 (en) | 1987-09-07 | 1987-09-07 | Semiconductor device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62223250A JP2534273B2 (en) | 1987-09-07 | 1987-09-07 | Semiconductor device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6465862A true JPS6465862A (en) | 1989-03-13 |
JP2534273B2 JP2534273B2 (en) | 1996-09-11 |
Family
ID=16795152
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62223250A Expired - Lifetime JP2534273B2 (en) | 1987-09-07 | 1987-09-07 | Semiconductor device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2534273B2 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0449000A2 (en) * | 1990-03-08 | 1991-10-02 | Fujitsu Limited | Layer structure having contact hole for fin-shaped capacitors in DRAMS and method of producing the same |
US5275974A (en) * | 1992-07-30 | 1994-01-04 | Northern Telecom Limited | Method of forming electrodes for trench capacitors |
US5658816A (en) * | 1995-02-27 | 1997-08-19 | International Business Machines Corporation | Method of making DRAM cell with trench under device for 256 Mb DRAM and beyond |
US5692281A (en) * | 1995-10-19 | 1997-12-02 | International Business Machines Corporation | Method for making a dual trench capacitor structure |
EP1071129A2 (en) * | 1999-07-22 | 2001-01-24 | Infineon Technologies North America Corp. | Crystal-axis-aligned vertical side wall DRAM and process for manufacture thereof |
US6194755B1 (en) | 1998-06-22 | 2001-02-27 | International Business Machines Corporation | Low-resistance salicide fill for trench capacitors |
JP2003501834A (en) * | 1999-06-09 | 2003-01-14 | インフィニオン テクノロジーズ ノース アメリカ コーポレイション | Method of extending trench by anisotropic wet etching |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5730363A (en) * | 1980-07-03 | 1982-02-18 | Ibm | Memory cell |
JPS60148165A (en) * | 1984-01-13 | 1985-08-05 | Toshiba Corp | Manufacture of semiconductor memory device |
JPS6132569A (en) * | 1984-07-25 | 1986-02-15 | Matsushita Electric Ind Co Ltd | Semiconductor device and manufacture thereof |
JPS6167257A (en) * | 1984-09-10 | 1986-04-07 | Toshiba Corp | Semiconductor memory |
-
1987
- 1987-09-07 JP JP62223250A patent/JP2534273B2/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5730363A (en) * | 1980-07-03 | 1982-02-18 | Ibm | Memory cell |
JPS60148165A (en) * | 1984-01-13 | 1985-08-05 | Toshiba Corp | Manufacture of semiconductor memory device |
JPS6132569A (en) * | 1984-07-25 | 1986-02-15 | Matsushita Electric Ind Co Ltd | Semiconductor device and manufacture thereof |
JPS6167257A (en) * | 1984-09-10 | 1986-04-07 | Toshiba Corp | Semiconductor memory |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0449000A2 (en) * | 1990-03-08 | 1991-10-02 | Fujitsu Limited | Layer structure having contact hole for fin-shaped capacitors in DRAMS and method of producing the same |
US5275974A (en) * | 1992-07-30 | 1994-01-04 | Northern Telecom Limited | Method of forming electrodes for trench capacitors |
US5658816A (en) * | 1995-02-27 | 1997-08-19 | International Business Machines Corporation | Method of making DRAM cell with trench under device for 256 Mb DRAM and beyond |
US5692281A (en) * | 1995-10-19 | 1997-12-02 | International Business Machines Corporation | Method for making a dual trench capacitor structure |
US6194755B1 (en) | 1998-06-22 | 2001-02-27 | International Business Machines Corporation | Low-resistance salicide fill for trench capacitors |
JP2003501834A (en) * | 1999-06-09 | 2003-01-14 | インフィニオン テクノロジーズ ノース アメリカ コーポレイション | Method of extending trench by anisotropic wet etching |
EP1071129A2 (en) * | 1999-07-22 | 2001-01-24 | Infineon Technologies North America Corp. | Crystal-axis-aligned vertical side wall DRAM and process for manufacture thereof |
Also Published As
Publication number | Publication date |
---|---|
JP2534273B2 (en) | 1996-09-11 |
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