JPH0750344A - Manufacture of semiconductor device - Google Patents

Manufacture of semiconductor device

Info

Publication number
JPH0750344A
JPH0750344A JP6198604A JP19860494A JPH0750344A JP H0750344 A JPH0750344 A JP H0750344A JP 6198604 A JP6198604 A JP 6198604A JP 19860494 A JP19860494 A JP 19860494A JP H0750344 A JPH0750344 A JP H0750344A
Authority
JP
Japan
Prior art keywords
channel
amorphous layer
annealing
source
substrate
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
Application number
JP6198604A
Other languages
Japanese (ja)
Other versions
JP2601209B2 (en
Inventor
Juri Kato
樹理 加藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Epson Corp
Original Assignee
Seiko Epson Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP6198604A priority Critical patent/JP2601209B2/en
Publication of JPH0750344A publication Critical patent/JPH0750344A/en
Application granted granted Critical
Publication of JP2601209B2 publication Critical patent/JP2601209B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PURPOSE:To lower a junction leakage current and to enable high integration by forming an amorphous layer by using silicon of specified crystal orientation face as a semiconductor substrate by BF2 or P implantation and by annealing it at a low temperature in the unit of second. CONSTITUTION:After an N-well 2 and a P-well 3 are formed in a silicon (100) substrate, an active element is separated by an LOCOS 4 and a gate film SiO2 6 and a gate electrode 5 are formed. BF2 is implanted to a P-channel/source/ drain region 8 and P is implanted to an N-channel/source/drain region 9 to form a shallow amorphous layer. After an insulation PSG film 7 is deposited, the amorphous layer is activated by performing annealing at a temperature exceeding 800 deg.C and not exceeding 1100 deg.C for the units of a second. A recrystallized impurity diffusion layer is formed to make a junction leak current InA/cm<2>. Thereby, P-channel and N-channel regions can be made fine and high integration can be realized.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、半導体装置の製造方法
に関する。特にCMOS VLSIの製造において有効
である。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a semiconductor device. It is particularly effective in manufacturing CMOS VLSI.

【0002】[0002]

【従来の技術】従来、イオン注入層のアニールは、電気
炉を用いて行なわれ、分単位(例えば、950℃30
分)の熱処理のため、注入された不純物が再分布し拡散
する。
2. Description of the Related Art Conventionally, an ion implantation layer is annealed by using an electric furnace, and the annealing is performed in a unit of minutes (for example, 950 ° C. and 30 ° C.).
Due to the heat treatment of 1), the implanted impurities are redistributed and diffused.

【0003】[0003]

【発明が解決しようとする課題】このためMOS・FE
Tのソース・ドレイン高濃度注入層においては、不純物
イオンの拡散のため、ゲート長を短かくするとパンチス
ルーが生じゲート長を2μm以下にすることが困難であ
る。特にCMOS LSIではPチャンネルのソース・
ドレイン領域にBまたはBF2 が注入されるため、高温
アニールにおけるPチャンネル・ソース・ドレインの横
拡がりが大きく、LSIの微細化、高集積化を困難にし
ている。また、(111)結晶方位面を持つSiウエー
ハにAsイオンが注入された場合、n+−p-の接合リー
ク電流を、約1nA/cm2 に減少させるためには、1
200℃ 8秒程度の熱処理が必要である。Asの場
合、拡散係数が小さいため、1200℃ 8秒の熱処理
でもAsイオンの再分布による拡散は小さく、1000
Å程度であるが、BまたはBF2 は拡散係数が大きく、
1200℃ 8秒のアニールにより2000Å以上の再
分布により拡散が生じる。このため、CMOS LSI
の製造において、(111)方位面のSi基板を用い
て、Pチャンネル領域にB、Nチャンネル領域にAsを
注入後、高温短時間熱処理によりアニールする従来の方
法は、CMOS LSIの微細化、特にPチャンネル領
域の微細化を困難にしていた。
[Problems to be Solved by the Invention]
In the source / drain high-concentration implantation layer of T, if the gate length is shortened, punch-through occurs due to diffusion of impurity ions, and it is difficult to reduce the gate length to 2 μm or less. Especially in CMOS LSI, P channel source
Since B or BF 2 is injected into the drain region, the lateral expansion of the P channel, source and drain during high temperature annealing is large, which makes it difficult to miniaturize and highly integrate the LSI. Further, when As ions are implanted into a Si wafer having a (111) crystal orientation plane, in order to reduce the junction leakage current of n + −p to approximately 1 nA / cm 2 ,
Heat treatment at 200 ° C. for about 8 seconds is required. In the case of As, since the diffusion coefficient is small, the diffusion due to the redistribution of As ions is small even at a heat treatment of 1200 ° C. for 8 seconds.
Although it is about Å, B or BF 2 has a large diffusion coefficient,
Annealing at 1200 ° C. for 8 seconds causes diffusion due to redistribution of 2000 Å or more. Therefore, CMOS LSI
In the production of (3), a conventional method of implanting B into the P channel region and As into the N channel region and annealing by high-temperature short-time heat treatment using a Si substrate having a (111) orientation surface is a method of miniaturizing a CMOS LSI, especially This made it difficult to miniaturize the P channel region.

【0004】[0004]

【課題を解決するための手段】本発明は、かかる従来の
欠点を補ない、Pチャンネル、Nチャンネル領域の両方
の微細化を可能にし、CMOS LSIの高集積化を可
能にする低温秒単位アニール技術による半導体の製造方
法を提供することを目的とする。
The present invention makes it possible to miniaturize both the P-channel and N-channel regions without compensating for the conventional drawbacks, and to anneal at a low temperature in seconds, which enables high integration of CMOS LSI. An object of the present invention is to provide a method for manufacturing a semiconductor by the technology.

【0005】本発明は、半導体基板として結晶方位面
(100)のシリコンを用いること及びPチャンネル領
域にはBF2 、NチャンネルにはP注入によりアモルフ
ァス層を形成後、低温(800℃以上1100℃以下)
秒単位アニールすることを特徴とする。即ち、(11
1)基仮に比べてアモルファス層と基板との界面の下の
領域の二次欠陥が少ない(100)基板を用いて、低温
短時間(秒単位)アニールを行なうことを特徴とする。
According to the present invention, silicon having a crystal orientation plane (100) is used as a semiconductor substrate, BF 2 is formed in a P channel region, and an amorphous layer is formed by P implantation in an N channel. Less than)
It is characterized by annealing for a second. That is, (11
1) A low-temperature short-time (second unit) annealing is performed using a (100) substrate having a smaller number of secondary defects in the region below the interface between the amorphous layer and the substrate as compared with the substrate.

【0006】[0006]

【実施例】以下、本発明を実施例を用いて説明する。EXAMPLES The present invention will be described below with reference to examples.

【0007】図1は、本発明によるCMOS FETの
断面図であり、基板1には(100)結晶方位面を持つ
シリコンを用い、Pチャンネルソース・ドレイン8領域
はBF2 イオン注入層、Nチャンネルソース・ドレイン
領域9には、Pイオン注入層が用いられることを特徴と
する。
FIG. 1 is a sectional view of a CMOS FET according to the present invention. Silicon having a (100) crystal orientation plane is used for a substrate 1, a P channel source / drain 8 region is a BF 2 ion implantation layer, and an N channel. The source / drain region 9 is characterized by using a P ion implantation layer.

【0008】シリコン(100)基板に、N well
2・P well3を形成後、LOCOS4により能動
素子を分離し、ゲート膜Si02 6及びゲート電極5を
形成後、Pチャンネル・ソース・ドレイン領域8にはB
2 を注入し浅いアモルファス層を形成、Nチャンネル
・ソース・ドレイン領域9にはPを注入し浅いアモルフ
ァス層を形成する。絶縁PSG膜7を蓄積後、ハロジエ
ン・ランプまたはグラフアイト・ヒータによりアイソ・
サーマル・アニールにより、イオン注入層の再結晶化、
活性化を行なう。ここで、BF2 によるイオン注入アモ
ルフアス層及びPによるイオン注入アモルフアス層は、
基板がSi(100)の場合低温短時間(例えば800
℃1秒)で再結晶化し、活性化する。
On a silicon (100) substrate, N well
After forming 2 · P well 3, the active element is separated by LOCOS 4, and after forming the gate film SiO 2 6 and the gate electrode 5, the P channel / source / drain region 8 is provided with B.
F 2 is injected to form a shallow amorphous layer, and P is injected to the N-channel source / drain region 9 to form a shallow amorphous layer. After accumulating the insulating PSG film 7, isolating the PSG film 7 with a halogen lamp or graphite heater.
Recrystallization of the ion-implanted layer by thermal annealing,
Activate. Here, the ion-implanted amorphous layer of BF 2 and the ion-implanted amorphous layer of P are:
When the substrate is Si (100)
It is recrystallized and activated at 1 ° C for 1 second).

【0009】この時、接合のリーク電流も1nA/cm
2と小さい。
At this time, the leak current of the junction is also 1 nA / cm.
2 and small.

【0010】図2は、本発明の低温短時間アニールの温
度一時間の2次元空間図を示し、(A)は、Si(10
0)基板にBF2 またはP注入によるアモルファス層が
再結晶化・活性化し、接合リークが1nA/cm2 程度
の特性を持つために必要最低限の熱処理条件を示す。
(B)は、BF2 またはP注入層の不純物が再分布し拡
散が始まるアニール条件である。従って図2の斜線部分
の温度・時間空間で熱処理することにより、Pチャンネ
ル及びNチャンネル領域のソース・ドレインが拡散せ
ず、しかも良好な接合を形成するため、両チャンネルの
微細化が可能になる。アニール後、コンタクト・ホール
を形成し、Al 10をパターニングすることによりC
MOS・FETが完成する。
FIG. 2 shows a two-dimensional space diagram for one hour during the low temperature short time annealing of the present invention.
0) The minimum heat treatment condition is shown because the amorphous layer formed by BF 2 or P implantation on the substrate is recrystallized and activated and the junction leak has a characteristic of about 1 nA / cm 2 .
(B) is an annealing condition in which impurities in the BF 2 or P-implanted layer are redistributed and diffusion starts. Therefore, by performing heat treatment in the temperature / time space in the shaded area in FIG. 2, the source / drain of the P channel and N channel regions do not diffuse and a good junction is formed, so that both channels can be miniaturized. . After annealing, by forming a contact hole and patterning Al 10, C
MOS FET is completed.

【0011】[0011]

【発明の効果】以上説明したように、本発明による半導
体装置の製造方法を用いれば、Pチャンネル領域の不純
物であるボロン及びNチャンネル領域の不純物であるリ
ンの再分布による拡散の生じない低温短時間でアニール
を行なうため、Pチャンネル及びNチャンネル領域の微
細化が可能となり、高集積化されたCMOS LSIを
提供することができる。CMOSLSIを提供すること
をできる。
As described above, when the method of manufacturing a semiconductor device according to the present invention is used, a low temperature short circuit in which diffusion due to redistribution of boron as an impurity in the P channel region and phosphorus as an impurity in the N channel region does not occur. Since annealing is performed in a time, the P-channel and N-channel regions can be miniaturized, and a highly integrated CMOS LSI can be provided. A CMOS LSI can be provided.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明によるCMOS・FETの断面図。FIG. 1 is a sectional view of a CMOS FET according to the present invention.

【図2】本発明による低温短時間アニールの温度一時間
の2次元空間図。
FIG. 2 is a two-dimensional space diagram for one hour of temperature of low temperature short time annealing according to the present invention.

【符号の説明】[Explanation of symbols]

1・・・(100)結晶方位面を持つシリコン基坂 2・・・N well 3・・・P well 4・・・LOCOS 5・・・ゲート電極 6・・・ゲート酸化膜 7・・・層間絶縁膜 8・・・BF2 注入層 9・・・P注入層 10・・AL配線 A・・・再結晶に必要な最低温度・時間アニール条件 B・・・ソース・ドレイン不純物が拡散しない最高温度
・時間アニール条件
1 ... Silicon substrate having (100) crystal orientation plane 2 ... N well 3 ... P well 4 ... LOCOS 5 ... Gate electrode 6 ... Gate oxide film 7 ... Interlayer Insulating film 8 ... BF 2 injection layer 9 ... P injection layer 10 ... AL wiring A ... Minimum temperature and time annealing conditions required for recrystallization B ... Maximum temperature at which source / drain impurities do not diffuse・ Time annealing condition

─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───

【手続補正書】[Procedure amendment]

【提出日】平成6年9月19日[Submission date] September 19, 1994

【手続補正1】[Procedure Amendment 1]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】特許請求の範囲[Name of item to be amended] Claims

【補正方法】変更[Correction method] Change

【補正内容】[Correction content]

【特許請求の範囲】[Claims]

【手続補正2】[Procedure Amendment 2]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】0004[Correction target item name] 0004

【補正方法】変更[Correction method] Change

【補正内容】[Correction content]

【0004】[0004]

【課題を解決するための手段】本発明は、かかる従来の
欠点を補ない、接合リーク電流の低く高集積化を可能に
する低温秒単位アニール技術による半導体の製造方法を
提供することを目的とする。
SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of manufacturing a semiconductor by a low temperature second unit annealing technique which does not make up for such a drawback of the prior art and enables high integration with a low junction leak current. To do.

【手続補正3】[Procedure 3]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】0005[Name of item to be corrected] 0005

【補正方法】変更[Correction method] Change

【補正内容】[Correction content]

【0005】本発明は、半導体基として結晶方位面
(100)のシリコンを用いること及びBFもしくは
P注入によりアモルファス層を形成後、低温(800℃
以上1100℃以下)秒単位アニールすることを特徴と
する。即ち、(111)基仮に比べてアモルファス層と
基板との界面の下の領域の二次欠陥が少ない(100)
基板を用いて、低温短時間(秒単位)アニールを行なう
ことを特徴とする。
The present invention, after forming an amorphous layer by and BF 2 or P injecting a silicon crystal orientation plane as the semiconductor base body (100), a low temperature (800 ° C.
It is characterized in that it is annealed every 1100 ° C. or less) seconds. That is, the number of secondary defects in the region below the interface between the amorphous layer and the substrate is smaller than that of the (111) substrate (100).
It is characterized in that low-temperature short-time (second unit) annealing is performed using the substrate.

【手続補正4】[Procedure amendment 4]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】0011[Correction target item name] 0011

【補正方法】変更[Correction method] Change

【補正内容】[Correction content]

【0011】[0011]

【発明の効果】以上説明したように、本発明による半導
体装置の製造方法を用いれば、Pチャンネル領域の不純
物であるボロン及びNチャンネル領域の不純物であるリ
ンの再分布による拡散の生じない低温短時間でアニール
を行なうため、Pチャンネル及びNチャンネル領域の微
細化が可能となり、高集積化されたCMOS LSIを
提供することができる。また接合リーク電流の少ない不
純物拡散層を形成することができるという効果を有する
ものである。
As described above, when the method of manufacturing a semiconductor device according to the present invention is used, a low temperature short circuit in which diffusion due to redistribution of boron as an impurity in the P channel region and phosphorus as an impurity in the N channel region does not occur. Since annealing is performed in a time, the P-channel and N-channel regions can be miniaturized, and a highly integrated CMOS LSI can be provided. In addition, the junction leakage current is small.
Has the effect of being able to form a pure material diffusion layer
It is a thing.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】(100)結晶方位面のシリコン基板にB
F2+ イオンを注入してPチャンネルトランジス夕のソ
ース・ドレイン領域となる第1アモルファス層を形成す
る工程、前記シリコン基板にP+ イオンを注入してNチ
ャンネルトランジス夕のソース・ドレイン領域となる第
2アモルファス層を形成する工程、前記半導体基板を8
00℃以上1100℃以下の温度で秒単位アニールをし
て前記第1アモルファス層及び前記第2アモルファス層
を活性化させることにより再結晶化する工程を有するこ
とを特徴とする半導体装置の製造方法。
1. B on a silicon substrate having a (100) crystal orientation plane.
A step of implanting F2 + ions to form a first amorphous layer which becomes a source / drain region of a P-channel transistor, and a step of implanting P + ions into the silicon substrate to become a source / drain region of an N-channel transistor. 2 step of forming an amorphous layer, the semiconductor substrate 8
A method of manufacturing a semiconductor device, comprising a step of performing reannealing at a temperature of 00 ° C. or more and 1100 ° C. or less for a second unit to activate the first amorphous layer and the second amorphous layer to recrystallize them.
JP6198604A 1994-08-23 1994-08-23 Method for manufacturing semiconductor device Expired - Lifetime JP2601209B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6198604A JP2601209B2 (en) 1994-08-23 1994-08-23 Method for manufacturing semiconductor device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6198604A JP2601209B2 (en) 1994-08-23 1994-08-23 Method for manufacturing semiconductor device

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP58194825A Division JPS6085512A (en) 1983-10-18 1983-10-18 Manufacture of semiconductor device

Publications (2)

Publication Number Publication Date
JPH0750344A true JPH0750344A (en) 1995-02-21
JP2601209B2 JP2601209B2 (en) 1997-04-16

Family

ID=16393964

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6198604A Expired - Lifetime JP2601209B2 (en) 1994-08-23 1994-08-23 Method for manufacturing semiconductor device

Country Status (1)

Country Link
JP (1) JP2601209B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56100412A (en) * 1979-12-17 1981-08-12 Sony Corp Manufacture of semiconductor device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56100412A (en) * 1979-12-17 1981-08-12 Sony Corp Manufacture of semiconductor device

Also Published As

Publication number Publication date
JP2601209B2 (en) 1997-04-16

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