JP6453634B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP6453634B2 JP6453634B2 JP2014249645A JP2014249645A JP6453634B2 JP 6453634 B2 JP6453634 B2 JP 6453634B2 JP 2014249645 A JP2014249645 A JP 2014249645A JP 2014249645 A JP2014249645 A JP 2014249645A JP 6453634 B2 JP6453634 B2 JP 6453634B2
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- insulating film
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- 239000004065 semiconductor Substances 0.000 title claims description 62
- 230000002093 peripheral effect Effects 0.000 claims description 28
- 239000000758 substrate Substances 0.000 claims description 27
- 239000010410 layer Substances 0.000 description 16
- 230000005684 electric field Effects 0.000 description 13
- 230000015556 catabolic process Effects 0.000 description 6
- 239000012535 impurity Substances 0.000 description 6
- 239000011229 interlayer Substances 0.000 description 3
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/06—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/12—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
- H01L29/42356—Disposition, e.g. buried gate electrode
- H01L29/4236—Disposition, e.g. buried gate electrode within a trench, e.g. trench gate electrode, groove gate electrode
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
- H01L29/42364—Gate electrodes for field effect devices for field-effect transistors with insulated gate characterised by the insulating layer, e.g. thickness or uniformity
- H01L29/42368—Gate electrodes for field effect devices for field-effect transistors with insulated gate characterised by the insulating layer, e.g. thickness or uniformity the thickness being non-uniform
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
- H01L29/42372—Gate electrodes for field effect devices for field-effect transistors with insulated gate characterised by the conducting layer, e.g. the length, the sectional shape or the lay-out
- H01L29/42376—Gate electrodes for field effect devices for field-effect transistors with insulated gate characterised by the conducting layer, e.g. the length, the sectional shape or the lay-out characterised by the length or the sectional shape
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/7801—DMOS transistors, i.e. MISFETs with a channel accommodating body or base region adjoining a drain drift region
- H01L29/7802—Vertical DMOS transistors, i.e. VDMOS transistors
- H01L29/7813—Vertical DMOS transistors, i.e. VDMOS transistors with trench gate electrode, e.g. UMOS transistors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/70—Bipolar devices
- H01L29/72—Transistor-type devices, i.e. able to continuously respond to applied control signals
- H01L29/739—Transistor-type devices, i.e. able to continuously respond to applied control signals controlled by field-effect, e.g. bipolar static induction transistors [BSIT]
- H01L29/7393—Insulated gate bipolar mode transistors, i.e. IGBT; IGT; COMFET
- H01L29/7395—Vertical transistors, e.g. vertical IGBT
- H01L29/7396—Vertical transistors, e.g. vertical IGBT with a non planar surface, e.g. with a non planar gate or with a trench or recess or pillar in the surface of the emitter, base or collector region for improving current density or short circuiting the emitter and base regions
- H01L29/7397—Vertical transistors, e.g. vertical IGBT with a non planar surface, e.g. with a non planar gate or with a trench or recess or pillar in the surface of the emitter, base or collector region for improving current density or short circuiting the emitter and base regions and a gate structure lying on a slanted or vertical surface or formed in a groove, e.g. trench gate IGBT
Description
10 :半導体基板
11 :ソース領域
12 :ベース領域
13 :ドレイン領域
15 :ドリフト領域
21 :表面電極
22 :裏面電極
30 :トレンチ
31 :第1側面
32 :第2側面
33 :開口部
34 :底部
36 :第1角部
37 :第2角部
40 :底面
41 :第1斜面
42 :第2斜面
43 :中心部
44 :周縁部
51 :ゲート絶縁膜
52 :ゲート電極
53 :層間絶縁膜
121 :ベースコンタクト領域
122 :低濃度ベース領域
123 :突出領域
141 :下端
401 :上端
402 :下端
Claims (3)
- 表面にトレンチが形成された半導体基板と、
前記トレンチの内面を覆うゲート絶縁膜と、
前記トレンチの内部に配置されたゲート電極と、を備え、
前記半導体基板は、
前記トレンチの両側面を覆う前記ゲート絶縁膜に接する第1導電型の第1領域と、
前記第1領域の下に形成され、前記トレンチの両側面を覆う前記ゲート絶縁膜に接する第2導電型の第2領域と、
前記第2領域の下に形成され、前記トレンチの両側面と底面を覆う前記ゲート絶縁膜に接する第1導電型の第3領域と、を備え、
前記トレンチの底面は、短手方向おいて中心部が周縁部より上に突出するように形成されており、
前記周縁部を覆う前記ゲート絶縁膜の厚みが、前記中心部を覆う前記ゲート絶縁膜の厚みより厚く、
前記トレンチの底面は、前記中心部から前記トレンチの一方の側面へ延びる第1斜面と、前記トレンチの他方の側面へ延びる第2斜面と、を備え、
前記第1斜面と前記第2斜面のなす角度が90°以下である、半導体装置。 - 前記第2領域は、前記ゲート絶縁膜から離間した位置で前記第3領域側に突出する突出領域を備える請求項1に記載の半導体装置。
- 前記トレンチの底面は、前記突出領域の下端より浅い位置に形成されている請求項2に記載の半導体装置。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014249645A JP6453634B2 (ja) | 2014-12-10 | 2014-12-10 | 半導体装置 |
CN201580061372.8A CN107112360B (zh) | 2014-12-10 | 2015-08-03 | 半导体装置 |
US15/517,289 US10153350B2 (en) | 2014-12-10 | 2015-08-03 | Semiconductor device |
PCT/JP2015/071977 WO2016092901A1 (ja) | 2014-12-10 | 2015-08-03 | 半導体装置 |
KR1020177018585A KR101917551B1 (ko) | 2014-12-10 | 2015-08-03 | 반도체 장치 |
EP15867694.0A EP3232478B1 (en) | 2014-12-10 | 2015-08-03 | Semiconductor device |
TW104137331A TWI584481B (zh) | 2014-12-10 | 2015-11-12 | Semiconductor device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014249645A JP6453634B2 (ja) | 2014-12-10 | 2014-12-10 | 半導体装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2016111283A JP2016111283A (ja) | 2016-06-20 |
JP6453634B2 true JP6453634B2 (ja) | 2019-01-16 |
Family
ID=56107100
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2014249645A Active JP6453634B2 (ja) | 2014-12-10 | 2014-12-10 | 半導体装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US10153350B2 (ja) |
EP (1) | EP3232478B1 (ja) |
JP (1) | JP6453634B2 (ja) |
KR (1) | KR101917551B1 (ja) |
CN (1) | CN107112360B (ja) |
TW (1) | TWI584481B (ja) |
WO (1) | WO2016092901A1 (ja) |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
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US5674766A (en) * | 1994-12-30 | 1997-10-07 | Siliconix Incorporated | Method of making a trench MOSFET with multi-resistivity drain to provide low on-resistance by varying dopant concentration in epitaxial layer |
US6194741B1 (en) * | 1998-11-03 | 2001-02-27 | International Rectifier Corp. | MOSgated trench type power semiconductor with silicon carbide substrate and increased gate breakdown voltage and reduced on-resistance |
JP4440552B2 (ja) | 2003-03-10 | 2010-03-24 | トヨタ自動車株式会社 | 電力用半導体装置およびその製造方法 |
JP2006344760A (ja) * | 2005-06-08 | 2006-12-21 | Sharp Corp | トレンチ型mosfet及びその製造方法 |
US7648877B2 (en) * | 2005-06-24 | 2010-01-19 | Fairchild Semiconductor Corporation | Structure and method for forming laterally extending dielectric layer in a trench-gate FET |
JP2008078175A (ja) * | 2006-09-19 | 2008-04-03 | Fuji Electric Holdings Co Ltd | トレンチmos型炭化珪素半導体装置の製造方法 |
JP2008218711A (ja) * | 2007-03-05 | 2008-09-18 | Renesas Technology Corp | 半導体装置およびその製造方法、ならびに電源装置 |
JP2009164558A (ja) | 2007-12-10 | 2009-07-23 | Toyota Central R&D Labs Inc | 半導体装置とその製造方法、並びにトレンチゲートの製造方法 |
JP5309587B2 (ja) * | 2008-02-07 | 2013-10-09 | 富士電機株式会社 | 炭化珪素半導体基板のトレンチエッチング方法 |
JP2011055017A (ja) * | 2010-12-17 | 2011-03-17 | Toshiba Corp | 半導体装置 |
WO2012105170A1 (ja) * | 2011-02-02 | 2012-08-09 | パナソニック株式会社 | 半導体装置およびその製造方法 |
JP5637916B2 (ja) * | 2011-03-31 | 2014-12-10 | トヨタ自動車株式会社 | 半導体装置及びその製造方法 |
US8563987B2 (en) * | 2011-06-28 | 2013-10-22 | Panasonic Corporation | Semiconductor device and method for fabricating the device |
JP5790573B2 (ja) * | 2012-04-03 | 2015-10-07 | 株式会社デンソー | 炭化珪素半導体装置およびその製造方法 |
CN102779843B (zh) * | 2012-07-23 | 2017-04-26 | 上海华虹宏力半导体制造有限公司 | 晶体管及其形成方法 |
JP6299102B2 (ja) | 2012-08-07 | 2018-03-28 | 株式会社デンソー | 炭化珪素半導体装置およびその製造方法 |
JP5747891B2 (ja) * | 2012-10-09 | 2015-07-15 | トヨタ自動車株式会社 | 半導体装置 |
DE112012007020T5 (de) | 2012-10-15 | 2015-07-09 | Toyota Jidosha Kabushiki Kaisha | Halbleitereinrichtung und Herstellungseinrichtung dafür |
JP5838176B2 (ja) * | 2013-02-12 | 2016-01-06 | サンケン電気株式会社 | 半導体装置 |
JP6131689B2 (ja) | 2013-04-16 | 2017-05-24 | 住友電気工業株式会社 | 炭化珪素半導体装置の製造方法 |
WO2014171048A1 (ja) * | 2013-04-16 | 2014-10-23 | パナソニック株式会社 | 炭化珪素半導体装置およびその製造方法 |
JP5630552B2 (ja) | 2013-10-15 | 2014-11-26 | 富士電機株式会社 | 炭化珪素半導体装置およびその製造方法 |
-
2014
- 2014-12-10 JP JP2014249645A patent/JP6453634B2/ja active Active
-
2015
- 2015-08-03 US US15/517,289 patent/US10153350B2/en active Active
- 2015-08-03 CN CN201580061372.8A patent/CN107112360B/zh active Active
- 2015-08-03 WO PCT/JP2015/071977 patent/WO2016092901A1/ja active Application Filing
- 2015-08-03 EP EP15867694.0A patent/EP3232478B1/en active Active
- 2015-08-03 KR KR1020177018585A patent/KR101917551B1/ko active IP Right Grant
- 2015-11-12 TW TW104137331A patent/TWI584481B/zh active
Also Published As
Publication number | Publication date |
---|---|
CN107112360A (zh) | 2017-08-29 |
KR20170093901A (ko) | 2017-08-16 |
EP3232478A1 (en) | 2017-10-18 |
JP2016111283A (ja) | 2016-06-20 |
KR101917551B1 (ko) | 2018-11-09 |
TWI584481B (zh) | 2017-05-21 |
EP3232478A4 (en) | 2017-11-29 |
CN107112360B (zh) | 2020-05-01 |
TW201631768A (zh) | 2016-09-01 |
US10153350B2 (en) | 2018-12-11 |
US20170309717A1 (en) | 2017-10-26 |
EP3232478B1 (en) | 2020-09-23 |
WO2016092901A1 (ja) | 2016-06-16 |
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