JPH05283393A - Method of forming groove of diffraction grating pattern - Google Patents

Method of forming groove of diffraction grating pattern

Info

Publication number
JPH05283393A
JPH05283393A JP10357092A JP10357092A JPH05283393A JP H05283393 A JPH05283393 A JP H05283393A JP 10357092 A JP10357092 A JP 10357092A JP 10357092 A JP10357092 A JP 10357092A JP H05283393 A JPH05283393 A JP H05283393A
Authority
JP
Japan
Prior art keywords
diffraction grating
grating pattern
mask
groove array
slit
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.)
Pending
Application number
JP10357092A
Other languages
Japanese (ja)
Inventor
Toshio Nishida
敏夫 西田
Toshiaki Tamamura
敏昭 玉村
Takuo Hirono
卓夫 廣野
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP10357092A priority Critical patent/JPH05283393A/en
Publication of JPH05283393A publication Critical patent/JPH05283393A/en
Pending legal-status Critical Current

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  • Semiconductor Lasers (AREA)

Abstract

PURPOSE:To provide a series of grooves of different depths in fewer process steps by using a mask that covers slit areas at different coverage ratios. CONSTITUTION:A mask 3 covers the periphery of a slit area 4A corresponding to a groove area 5A that includes a series of grooves 6 forming a diffraction grating pattern; it also covers the peripheries of slit areas 4BL and 4BR corresponding to groove areas 5BL and 5BR that include a series of grooves 6. The coverage ratio is greater in the former area than in the latter. Large windows 7A are formed around and near the slit area 4A, whereas relatively small windows 7BL and 7BR are formed around and away from the slit areas 4BL and 4BR. Those slit areas are used as an etching mask so that a series of grooves of different depths can be formed easily.

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、回折格子パタ―ン溝列
を有する分布帰還型半導体レ―ザを製造する場合に適用
して好適な回折格子パタ―ン溝列形成法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of forming a diffraction grating pattern groove array suitable for manufacturing a distributed feedback type semiconductor laser having a diffraction grating pattern groove array.

【0002】[0002]

【従来の技術】従来、図4〜図9を伴って次に述べる原
理的な回折格子パタ―ン溝列形成法が提案されている。
2. Description of the Related Art Heretofore, a method of forming a diffraction grating pattern groove array, which is a principle described below with reference to FIGS. 4 to 9, has been proposed.

【0003】すなわち、予め用意された、例えばInP
結晶でなり且つ(100)面の結晶面に面出しされてい
る平らな表面2を有する半導体基板1の表面2上に、回
折格子パタ―ンを有するスリット列4Aを形成してい
る、たとえば電子レジストでなるマスク3Aを、リソグ
ラフィ法によって形成する(図4)。
That is, for example, InP prepared in advance is used.
A slit array 4A having a diffraction grating pattern is formed on a surface 2 of a semiconductor substrate 1 which is a crystal and has a flat surface 2 which is faced to a (100) crystal face. A mask 3A made of resist is formed by a lithography method (FIG. 4).

【0004】次に、半導体基板1に対する、マスク3A
をマスクとする、拡散律速反応によってエッチング処理
を行うエッチャントを用いたエッチング処理によって、
半導体基板1の表面2に、マスク3Aのスリット列4A
と同じ回折格子パタ―ンを有する溝列5Aを、100A
のような比較的浅い各溝の深さDA に形成する(図
5)。
Next, a mask 3A for the semiconductor substrate 1
By using an etchant with an etchant that uses the mask as a mask and performs an etching process by a diffusion-controlled reaction,
On the surface 2 of the semiconductor substrate 1, the slit row 4A of the mask 3A
The groove array 5A having the same diffraction grating pattern as
Is formed at a relatively shallow depth D A of each groove (FIG. 5).

【0005】次に、半導体基板1上からマスク3を除去
する(図6)。
Next, the mask 3 is removed from the semiconductor substrate 1 (FIG. 6).

【0006】次に、半導体基板1の表面2上に、もし、
回折格子パタ―ンを有するスリット列4Aを形成してい
るマスク3Aが除去されていないとすれば、そのマスク
3Aのスリット列4Aの両端側からそのスリット列4A
の延長方向に外方にスリット4Aと同じ回折格子パタ―
ンで一連にそれぞれ延長している、という態様を有する
スリット列4Aと同じ回折格子パタ―ンを有するスリッ
ト列4BL及び4BRを形成している、上述したマスク
3Aと同様の材料でなるマスク3Bを、リソグラフィ法
によって形成する(図7)。
Next, on the surface 2 of the semiconductor substrate 1, if
Assuming that the mask 3A forming the slit array 4A having the diffraction grating pattern is not removed, the slit array 4A from both end sides of the slit array 4A of the mask 3A.
The same diffraction grating pattern as slit 4A outward in the extension direction of
A mask 3B made of the same material as the above-mentioned mask 3A, which forms slit rows 4BL and 4BR having the same diffraction grating pattern as the slit row 4A having a mode in which they are extended in series. , Lithographically formed (FIG. 7).

【0007】次に、半導体基板1に対する、マスク3B
をマスクとする、拡散律速反応によってエッチング処理
を行うエッチャントを用いたエッチング処理によって、
半導体基板1の表面2に、マスク3Bのスリット列4B
L及び4BRと同じ回折格子パタ―ンを有する溝列部5
BL及び5BRを、400Aのような溝列5Aに比し深
い各溝の深さDB に形成し、よって、溝列5Aと、その
両端側からの溝列5Aの延長方向に外方に溝列5Aを同
じ回折格子パタ―ンでそれぞれ延長し且つ溝列5Aの各
溝の深さDA に比し深い各溝の深さDB を有する溝列5
BL及び5BRとからなる溝列6を、溝列5A、5BL
及び5BRを溝列6の溝列部として、形成する(図
8)。
Next, the mask 3B for the semiconductor substrate 1 is formed.
By using an etchant with an etchant that uses the mask as a mask and performs an etching process by a diffusion-controlled reaction,
On the surface 2 of the semiconductor substrate 1, the slit row 4B of the mask 3B
Groove row portion 5 having the same diffraction grating pattern as L and 4BR
BL and 5BR are formed at a depth D B of each groove, which is deeper than the groove array 5A such as 400A, so that the groove array 5A and the groove outwardly in the extension direction of the groove array 5A from both ends thereof are formed. A groove array 5 that extends each row 5A with the same diffraction grating pattern and has a depth D B of each groove that is deeper than the depth D A of each groove of the groove array 5A.
The groove array 6 composed of BL and 5BR is replaced with the groove arrays 5A, 5BL.
And 5BR are formed as the groove row portion of the groove row 6 (FIG. 8).

【0008】次に、半導体基板1の表面2上から、マス
ク3Bを除去する(図9)。
Next, the mask 3B is removed from the surface 2 of the semiconductor substrate 1 (FIG. 9).

【0009】以上が、従来提案されている原理的な回折
格子パタ―ン溝列形成法である。
The above is the method of forming the diffraction grating pattern groove array which has been proposed in principle.

【0010】このような従来の回折格子パタ―ン溝列形
成法によれば、それを、回折格子パタ―ン溝列を有する
分布帰還型半導体レ―ザを製造する場合に適用ことがで
きる。
According to such a conventional diffraction grating pattern groove array forming method, it can be applied when manufacturing a distributed feedback semiconductor laser having a diffraction grating pattern groove array.

【0011】[0011]

【発明が解決しようとする課題】図4〜図9に示す従来
の回折格子パタ―ン溝列形成法の場合、半導体基板1の
表面2上にマスク3Aを形成し(図4)、次で、それを
マスクとする半導体基板1に対するエッチング処理を行
い(図5)、次に、再度、半導体基板1の表面2上にマ
スク3Bを形成し(図7)、次で、それをマスクとする
半導体基板1に対するエッチング処理を行うことで、半
導体基板1の表面2に、マスク3A及び3Bと同じ回折
格子パタ―ンを有し且つ互に異なる深さDA 、及びDB
をそれぞれ有する溝列部5A、5BL及び5BRからな
る溝列6を形成している。このため、半導体基板1の表
面2上に、マスクと同じ回折格子パタ―ンを有し且つ互
に異なる深さを有する複数の溝列部からなる溝列を形成
するにつき、半導体基板1の表面2上に、マスクを形成
し、次で、それをマスクとする半導体基板1に対するエ
ッチング処理を行うことを、複数回行う必要があり、ま
た、半導体基板1の表面2上に第1回目以後に形成する
マスクについては、そのマスクを、それを形成する前に
形成された溝列部と精密に位置合せをする必要がある。
In the case of the conventional diffraction grating pattern groove array forming method shown in FIGS. 4 to 9, a mask 3A is formed on the surface 2 of the semiconductor substrate 1 (FIG. 4), and then, Then, the semiconductor substrate 1 using the mask as a mask is subjected to etching treatment (FIG. 5), then the mask 3B is formed again on the surface 2 of the semiconductor substrate 1 (FIG. 7), and then used as a mask. By performing the etching process on the semiconductor substrate 1, the surface 2 of the semiconductor substrate 1 has the same diffraction grating pattern as the masks 3A and 3B and different depths D A and D B.
The groove array 6 is formed by the groove array portions 5A, 5BL and 5BR each having Therefore, when forming a groove array including a plurality of groove array portions having the same diffraction grating pattern as the mask and different depths from each other on the surface 2 of the semiconductor substrate 1, the surface of the semiconductor substrate 1 It is necessary to form a mask on the surface of the semiconductor substrate 2 and then perform the etching process on the semiconductor substrate 1 using the mask as the mask a plurality of times. Regarding the mask to be formed, it is necessary to precisely align the mask with the groove array portion formed before forming the mask.

【0012】従って、図4〜図9に示す従来の回折格子
パタ―ン溝列形成法の場合、回折格子パタ―ンを有し且
つ互に異なる深さを有する複数の溝列部からなる溝列
を、少ない工程数で、容易に形成することができない、
という欠点を有していた。
Therefore, in the case of the conventional diffraction grating pattern groove array forming method shown in FIGS. 4 to 9, a groove having a diffraction grating pattern and having a plurality of groove array portions having mutually different depths. Rows cannot be easily formed with a small number of steps,
It had the drawback.

【0013】よって、本発明は、上述した欠点のない、
新規な回折格子パタ―ン溝列形成法を提案せんとするも
のである。
Thus, the present invention does not have the drawbacks mentioned above,
The purpose is to propose a new method for forming a diffraction grating pattern groove array.

【0014】[0014]

【課題を解決するための手段】本発明による回折格子パ
タ―ン溝列形成法は、図4〜図9で前述した従来の回折
格子パタ―ン溝列形成法の場合に準じて、半導体基板に
対する、回折格子パタ―ンを有するスリット列を形成し
ているマスクと拡散律速反応によってエッチング処理を
行うエッチャントとを用いたエッチング処理によって、
上記半導体基板の表面に、上記マスクと同じ回折格子パ
タ―ンを有し且つ互に異なる深さを有する複数の溝列部
からなる溝列を形成する。
A method of forming a diffraction grating pattern groove array according to the present invention is based on a semiconductor substrate according to the conventional diffraction grating pattern groove array forming method described above with reference to FIGS. , By an etching process using a mask forming a slit array having a diffraction grating pattern and an etchant performing an etching process by a diffusion-controlled reaction,
On the surface of the semiconductor substrate, a groove array having a plurality of groove array portions having the same diffraction grating pattern as the mask and different depths is formed.

【0015】しかしながら、本発明による回折格子パタ
―ン溝列形成法によれば、上記マスクが、上記スリット
列の、上記溝列の複数の溝列部にそれぞれ対応している
複数のスリット列部のまわりにおいて、互に異なる被覆
率を有している。
However, according to the method of forming the diffraction grating pattern groove array according to the present invention, the mask has a plurality of slit row portions corresponding to the plurality of groove row portions of the groove row. Have different coverages around.

【0016】[0016]

【作用・効果】本発明による回折格子パタ―ン溝列形成
法によれば、半導体基板上に、回折格子パタ―ンを有す
る複数のスリット列部からなるスリット列を形成し且つ
その複数のスリット列部のまわりにおいて互に異なる被
覆率を有せしめているマスクを形成しさえすれば、その
ようなマスクを半導体基板上に形成し、次でそれをマス
クとする半導体基板に対する拡散律速反応によってエッ
チング処理を行うエッチャントを用いたエッチング処理
を行うことを、ただ1回行うだけで、従って、図4〜図
9で前述した従来の回折格子パタ―ン溝列形成法の場合
に比し少ない工程数で、しかも図4〜図9に示す従来の
回折格子パタ―ン溝列形成法で前述したようなマスクの
位置合せの必要なしに、マスクと同じ回折格子パタ―ン
を有し且つ互に異なる深さを有する複数の溝列部からな
る溝列を、容易に形成することができる。
According to the method of forming a diffraction grating pattern groove array according to the present invention, a slit array including a plurality of slit array portions having a diffraction grating pattern is formed on a semiconductor substrate and the plurality of slits are formed. As long as masks having different coverages around the row portions are formed, such masks are formed on a semiconductor substrate, and then etching is performed by a diffusion-controlled reaction with respect to the semiconductor substrate using the masks as masks. The etching process using the etchant is performed only once, and therefore the number of steps is smaller than that in the conventional diffraction grating pattern groove array forming method described above with reference to FIGS. In addition, the mask has the same diffraction grating pattern as that of the mask and does not require the alignment of the mask as described above in the conventional diffraction grating pattern groove forming method shown in FIGS. The groove array comprising a plurality of groove array portion having a depth that can be easily formed.

【0017】[0017]

【実施例】次に、図1を伴って、原理的な、本発明によ
る回折格子パタ―ン溝列形成法の実施例を述べよう。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, referring to FIG. 1, an embodiment of the method of forming a diffraction grating pattern groove array according to the present invention will be described.

【0018】図1において、図2との対応部分には同一
符号を付して示す。
In FIG. 1, parts corresponding to those in FIG. 2 are designated by the same reference numerals.

【0019】図1に示す原理的な本発明による回折格子
パタ―ン溝列形成法は、次に述べる順次の工程をとっ
て、回折格子パタ―ン溝列を形成する。
In the method of forming a diffraction grating pattern groove array according to the present invention shown in FIG. 1, the diffraction grating pattern groove array is formed by the following sequential steps.

【0020】すなわち、予め用意された、例えばInP
結晶でなり且つ(100)面の結晶面に面出しされてい
る平らな表面2を有する半導体基板1の表面2上に、図
4〜図9で前述した従来の回折格子パタ―ン溝列形成法
におけるマスク3のスリット列4Aまたはマスク3Bの
スリット列5BL及び5BRと同様の回折格子パタ―ン
を有するスリット列4を形成している、例えば電子レジ
ストでなるマスク3を、それ自体は公知のリソグラフィ
法によって形成する(図1)。
That is, InP prepared in advance, for example,
Formation of a conventional diffraction grating pattern groove array described above with reference to FIGS. 4 to 9 on a surface 2 of a semiconductor substrate 1 which is a crystal and has a flat surface 2 which is faced to a (100) crystal face. A mask 3 made of, for example, an electronic resist, which forms a slit array 4 having a diffraction grating pattern similar to the slit array 4A of the mask 3 or the slit arrays 5BL and 5BR of the mask 3B in the method, is known per se. It is formed by a lithographic method (FIG. 1).

【0021】この場合、マスク3を、図4〜図9で前述
した従来の回折格子パタ―ン溝列形成法において形成さ
れる回折格子パタ―ンを有する溝列6を構成している溝
列部5Aに対応しているスリット列部4Aのまわりにお
ける被覆率が、図4〜図9で前述した従来の回折格子パ
タ―ン溝列形成法において形成される溝列6を構成して
いる溝列部5BL及び5BRにそれぞれ対応しているス
リット部4BL及び4BRのまわりにおける被覆率に比
し大であるように、スリット列部4Aのまわりには、大
きな窓7Aをスリット列部4Aに近接して形成し、スリ
ット列部4BL及び4BRのまわりには窓7Aに比し小
さな窓7BL及び7BRをスリット列部4BL及び4B
Rから比較的遠い位置に形成する。
In this case, the mask 3 is a groove array forming a groove array 6 having a diffraction grating pattern formed by the conventional diffraction grating pattern groove array forming method described above with reference to FIGS. The coverage around the slit row portion 4A corresponding to the portion 5A constitutes the groove row 6 which is formed in the conventional diffraction grating pattern groove row forming method described above with reference to FIGS. A large window 7A is provided in the vicinity of the slit row portion 4A around the slit row portion 4A so as to be larger than the coverage around the slit portions 4BL and 4BR corresponding to the row portions 5BL and 5BR, respectively. Windows 7BL and 7BR smaller than the window 7A are formed around the slit row portions 4BL and 4BR.
It is formed at a position relatively far from R.

【0022】次に、半導体基板1に対するマスク3をマ
スクとする拡散律速反応によってエッチング処理を行う
エッチャント、例えば飽和臭素水と臭化水素酸と水との
1:10:40の混合比を有するエッチャントを用いた
エッチング処理によって、半導体基板1の表面2に、マ
スク3のスリット列部4A、4BL及び4BRと同じ回
折格子パタ―ンを有し且つスリット列部4A、4BL及
び4BRにそれぞれ対応している溝列部5A、5BL及
び5BRからなる溝列6を形成する(図2)。この場
合、溝列部5BL及び5BRは、マスク3のスリット列
部4BL及び4BRのまわりの被覆率がスリット列部4
Aに比し小さいので、溝列部5Aの深さDA に比し深い
深さDB に形成される。
Next, an etchant for etching the semiconductor substrate 1 by a diffusion-controlled reaction using the mask 3 as a mask, for example, an etchant having a mixture ratio of saturated bromine water, hydrobromic acid, and water of 1:10:40. The surface 2 of the semiconductor substrate 1 has the same diffraction grating pattern as that of the slit row portions 4A, 4BL and 4BR of the mask 3 by the etching process using, and corresponds to the slit row portions 4A, 4BL and 4BR, respectively. A groove array 6 composed of the groove array portions 5A, 5BL, and 5BR is formed (FIG. 2). In this case, in the groove row portions 5BL and 5BR, the coverage ratio around the slit row portions 4BL and 4BR of the mask 3 is the slit row portion 4.
Since it is smaller than A, it is formed to a depth D B which is deeper than the depth D A of the groove array portion 5A.

【0023】次に、半導体基板1の表面2上から、マス
ク3を除去する(図3)。
Next, the mask 3 is removed from the surface 2 of the semiconductor substrate 1 (FIG. 3).

【0024】以上が、本発明による回折格子パタ―ン溝
列形成法の実施例である。
The above is the embodiment of the method of forming the diffraction grating pattern groove array according to the present invention.

【0025】このような本発明による回折格子パタ―ン
溝列形成法によれば、半導体基板1の表面2上にマスク
3を形成し、次でそのマスク3をマスクとする半導体基
板1に対する拡散律速反応によってエッチング処理を行
うエッチャントを用いたエッチング処理を行うことをた
だ1回行うだけで、半導体基板1の表面2に、回折格子
パタ―ンを有し且つ互に異なる深さを有する複数の溝列
部5A、5BL及び5BRからなる溝列6を容易に形成
することができ、また、そこに、図4〜図9で前述した
従来の回折格子パタ―ン溝列形成法の場合のようなマス
クの位置合せを必要としたりしない。
According to the method for forming a diffraction grating pattern groove array according to the present invention as described above, a mask 3 is formed on the surface 2 of the semiconductor substrate 1, and then the mask 3 is used as a mask to diffuse into the semiconductor substrate 1. The etching process using the etchant that performs the etching process by the rate-determining reaction is performed only once, so that the surface 2 of the semiconductor substrate 1 has a plurality of diffraction grating patterns and different depths. The groove array 6 composed of the groove array portions 5A, 5BL and 5BR can be easily formed, and the same as in the case of the conventional diffraction grating pattern groove array forming method described above with reference to FIGS. It does not require a proper mask alignment.

【0026】なお、上述においては、本発明を、溝列部
5Aと、その両端側から外方にそれぞれ延長している溝
列部5BL及び5BRとからなる溝列6を形成するのに
適用した場合につき述べたが、本発明は、要は互に異な
る深さを有する複数の溝列部からなる溝列を形成する場
合にも適用し得ることは明らかであろう。また、上述し
た半導体基板は、半導体基板本体上に半導体層が形成さ
れている構成を有するものをも意味することは明らかで
あろう。
In the above description, the present invention is applied to form the groove array 6 including the groove array portion 5A and the groove array portions 5BL and 5BR extending outward from both ends thereof. Although described with respect to the case, it will be apparent that the present invention can also be applied to the case where a groove array including a plurality of groove array portions having mutually different depths is formed. Further, it will be apparent that the above-mentioned semiconductor substrate also means one having a structure in which a semiconductor layer is formed on the semiconductor substrate body.

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

【図1】本発明による回折格子パタ―ン溝列形成法の実
施例の説明に供する、最初の工程における略線的平面図
及びそのB−B線上、C−C線上及びD−D線上の断面
図である。
FIG. 1 is a schematic plan view in the first step and its BB line, C-C line, and D-D line for explaining an embodiment of a diffraction grating pattern groove array forming method according to the present invention. FIG.

【図2】本発明による回折格子パタ―ン溝列形成法の実
施例の説明に供する、図1に示す工程に続く工程の略線
的断面図である。
FIG. 2 is a schematic cross-sectional view of a step following the step shown in FIG. 1 for explaining an embodiment of the diffraction grating pattern groove array forming method according to the present invention.

【図3】本発明による回折格子パタ―ン溝列形成法の実
施例の説明に供する、図2に示す工程に続く工程の略線
的平面図及びそのB−B線上の断面図である。
3A and 3B are a schematic plan view of a step following the step shown in FIG. 2 and a cross-sectional view taken along the line BB thereof for explaining an embodiment of a diffraction grating pattern groove array forming method according to the present invention.

【図4】従来の回折格子パタ―ン溝列形成法の説明に供
する、最初の工程における略線的平面図及びそのB−B
線上の断面図である。
FIG. 4 is a schematic plan view in the first step and its BB for explaining a conventional method of forming a diffraction grating pattern groove array.
It is sectional drawing on a line.

【図5】従来の回折格子パタ―ン溝列形成法の説明に供
する、図4に示す工程に続く工程の略線的断面図であ
る。
FIG. 5 is a schematic cross-sectional view of a step following the step shown in FIG. 4 for explaining a conventional diffraction grating pattern groove array forming method.

【図6】従来の回折格子パタ―ン溝列形成法の説明に供
する、図5に示す工程に続く工程の略線的断面図であ
る。
FIG. 6 is a schematic cross-sectional view of a step following the step shown in FIG. 5 for explaining the conventional method of forming a diffraction grating pattern groove array.

【図7】従来の回折格子パタ―ン溝列形成法の説明に供
する、図6に示す工程に続く略線的平面図及びそのB−
B線上の断面図である。
FIG. 7 is a schematic plan view following the step shown in FIG. 6 for explaining the conventional method of forming a diffraction grating pattern groove array and its B-
It is sectional drawing on the B line.

【図8】従来の回折格子パタ―ン溝列形成法の説明に供
する、図7に示す工程に続く工程の略線的断面図であ
る。
FIG. 8 is a schematic cross-sectional view of a step following the step shown in FIG. 7, which is used for explaining a conventional method of forming a diffraction grating pattern groove array.

【図9】従来の回折格子パタ―ン溝列形成法の説明に供
する、図8に示す工程に続く工程の略線的平面図及びそ
のB−B線上の断面図である。
9A and 9B are a schematic plan view of a step following the step shown in FIG. 8 and a cross-sectional view taken along line BB thereof for explaining a conventional method of forming a diffraction grating pattern groove array.

【符号の説明】[Explanation of symbols]

1 半導体基板 2 表面 3 マスク 3A、3B マスク 4 スリット列 4A スリット列部 4BL、4BR スリット列部 5A 溝列部 5BL、5BR 溝列部 6 溝列 7A 窓 7BL、7BR 窓 1 Semiconductor substrate 2 Surface 3 Mask 3A, 3B Mask 4 Slit row 4A Slit row part 4BL, 4BR Slit row part 5A Groove row part 5BL, 5BR Groove row part 6 Groove row 7A Window 7BL, 7BR Window

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 半導体基板に対する、回折格子パタ―ン
を有するスリット列を形成しているマスクと拡散律速反
応によってエッチング処理を行うエッチャントとを用い
たエッチング処理によって、上記半導体基板の表面に、
上記マスクと同じ回折格子パタ―ンを有し且つ互に異な
る深さを有する複数の溝列部からなる溝列を形成する回
折格子パタ―ン溝列形成法において、 上記マスクが、上記スリット列の、上記溝列の複数の溝
列部にそれぞれ対応している複数のスリット列部のまわ
りにおいて、互に異なる被覆率を有していることを特徴
とする回折格子パタ―ン溝列形成法。
1. A surface of a semiconductor substrate is etched by using a mask forming a slit array having a diffraction grating pattern and an etchant for etching by a diffusion-controlled reaction on the surface of the semiconductor substrate.
In a diffraction grating pattern groove array forming method for forming a groove array having a plurality of groove array portions having the same diffraction grating pattern as the mask and different depths from each other, the mask includes the slit array. A method for forming a diffraction grating pattern groove array, characterized in that the plurality of slit array portions respectively corresponding to the plurality of groove array portions of the groove array have different coverages from each other. .
JP10357092A 1992-03-30 1992-03-30 Method of forming groove of diffraction grating pattern Pending JPH05283393A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10357092A JPH05283393A (en) 1992-03-30 1992-03-30 Method of forming groove of diffraction grating pattern

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10357092A JPH05283393A (en) 1992-03-30 1992-03-30 Method of forming groove of diffraction grating pattern

Publications (1)

Publication Number Publication Date
JPH05283393A true JPH05283393A (en) 1993-10-29

Family

ID=14357463

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10357092A Pending JPH05283393A (en) 1992-03-30 1992-03-30 Method of forming groove of diffraction grating pattern

Country Status (1)

Country Link
JP (1) JPH05283393A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0703605A3 (en) * 1994-09-02 1998-03-11 Mitsubishi Denki Kabushiki Kaisha Method for etching semiconductor, method for fabricating semiconductor device, method for fabricating semiconductor laser, and semiconductor laser
JP2012209426A (en) * 2011-03-30 2012-10-25 Nippon Telegr & Teleph Corp <Ntt> Method for manufacturing semiconductor device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0703605A3 (en) * 1994-09-02 1998-03-11 Mitsubishi Denki Kabushiki Kaisha Method for etching semiconductor, method for fabricating semiconductor device, method for fabricating semiconductor laser, and semiconductor laser
US5872022A (en) * 1994-09-02 1999-02-16 Mitsubishi Denki Kabushiki Kaisha Method for etching a semiconductor method for fabricating semiconductor device method for fabricating semiconductor laser and semiconductor laser
JP2012209426A (en) * 2011-03-30 2012-10-25 Nippon Telegr & Teleph Corp <Ntt> Method for manufacturing semiconductor device

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