JPH02224218A - Semiconductor device substrate - Google Patents

Semiconductor device substrate

Info

Publication number
JPH02224218A
JPH02224218A JP1043037A JP4303789A JPH02224218A JP H02224218 A JPH02224218 A JP H02224218A JP 1043037 A JP1043037 A JP 1043037A JP 4303789 A JP4303789 A JP 4303789A JP H02224218 A JPH02224218 A JP H02224218A
Authority
JP
Japan
Prior art keywords
mark
substrate
semiconductor device
photomask
improved
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
JP1043037A
Other languages
Japanese (ja)
Inventor
Matsuo Takaoka
高岡 松雄
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP1043037A priority Critical patent/JPH02224218A/en
Publication of JPH02224218A publication Critical patent/JPH02224218A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00Details of semiconductor or other solid state devices
    • H01L23/544Marks applied to semiconductor devices or parts, e.g. registration marks, alignment structures, wafer maps
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2223/00Details relating to semiconductor or other solid state devices covered by the group H01L23/00
    • H01L2223/544Marks applied to semiconductor devices or parts
    • H01L2223/54493Peripheral marks on wafers, e.g. orientation flats, notches, lot number
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001Technical content checked by a classifier
    • H01L2924/0002Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

Abstract

PURPOSE:To improve the life of a mark and, further, maintain the adhesiveness between a photomask and a substrate in a satisfactory condition and improve a resolution by a method wherein, when the mark is formed, the crest of a protrusion produced around the recessed mark is formed on a level lower than the element forming surface of a semiconductor device substrate. CONSTITUTION:As a mark forming region 2 is formed on a level about 1mum or lower than an element forming surface 11, even if a deep trench mark 4 is formed by a laser marking method, a crown-shaped mountain 5 produced around the mark 4 is not heigher than the element forming surface 11. With this constitution, the adhesiveness between a photomask 3 and a substrate 1 can be improved and a resolution can be improved. Moreover, as the marking trench can be formed deeply, the life of the mark until a reading error is caused by filling the marking trench in a deposition process can be improved.

Description

【発明の詳細な説明】 〔概要) 半導体装置用基板の改良に関し、 堆積物によって読み取り誤差が生ずるまでのマークの寿
命が長くなり、かつ、フォトマスクと基板との密着性を
良好に保って解像度を向上するようにされた半導体装置
用基板を提供することを目的とし、 レーザが照射されて凹状のマークが形成されるマーク形
成領域を有する半導体装置用基板において、前記のマー
ク形成領域が、前記のマーク形成時に、前記の凹状のマ
ーク周囲部に形成される凸部の頂部が半導体装置用基板
の素子形成面よりも高くならない程度に半導体装置用基
板の素子形成面より低く形成されるように構成される。
[Detailed Description of the Invention] [Summary] Regarding the improvement of substrates for semiconductor devices, the lifespan of marks until reading errors occur due to deposits is increased, and the resolution is improved by maintaining good adhesion between the photomask and the substrate. The object of the present invention is to provide a substrate for a semiconductor device having a mark forming region on which a concave mark is formed by laser irradiation, wherein the mark forming region is When forming the mark, the top of the convex portion formed around the concave mark is formed to be lower than the element formation surface of the semiconductor device substrate to the extent that it does not become higher than the element formation surface of the semiconductor device substrate. configured.

〔産業上の利用分野〕[Industrial application field]

本発明は、半導体装置用基板の改良、特に、レーザマー
キング法を使用して形成されたマークの寿命が長(なり
、かつ、このマークを使用した場合、解像度が向上する
ようにされた形状的改良に関する。
The present invention relates to improvements in substrates for semiconductor devices, and in particular, to improvements in substrates for semiconductor devices, and in particular, features in which marks formed using a laser marking method have a longer lifespan (and when this mark is used, the resolution is improved). Regarding improvements.

〔従来の技術〕[Conventional technology]

半導体装置用基板にマークを形成する伝統的方法として
は、フォトリソグラフィー法がある。近年、レーザを使
用する加工技術の進歩にともない、レジスト膜形成・バ
ターニング・エツチングという複数の工程を必要とする
これまでのフォトリソグラフィー法に代わって、レーザ
を使用してマークを形成する方法が使用されるようにな
った。
Photolithography is a traditional method for forming marks on semiconductor device substrates. In recent years, with the advancement of processing technology using lasers, a method of forming marks using a laser has been introduced instead of the conventional photolithography method, which requires multiple steps of forming a resist film, buttering, and etching. came into use.

〔発明が解決しようとする課題ゴ ところで、フォトリソグラフィー法を使用して基板にマ
ークを形成する場合には、マークの周囲に凸部が形成さ
れることがないので、密着型フォトマスクを使用する場
合にフォトマスクと基板との密着性が悪くなることがな
く、したがって、解像度が低下するという問題は起こら
なかった。
[Problem to be Solved by the Invention] By the way, when forming marks on a substrate using photolithography, a contact photomask is used because no convex portions are formed around the marks. In this case, the adhesion between the photomask and the substrate did not deteriorate, and therefore, the problem of reduced resolution did not occur.

第9図参照 ところが、レーザを使用してマークを形成する場合には
、第9図に示すように、マーキング溝4の周囲にクラウ
ン状の山5が形成されるため、密着型フォトマスク3を
使用する場合に、フォトマスク3と基板1との密着性が
悪くなり、解像度が低下する。マーキング溝4の深さを
浅くすれば、クラウン状の山5の高さが低くなり、フォ
トマスク3と基板lとの密着性の悪化の程度は少なくな
るが、堆積工程においてマーキング溝4が堆積物によっ
て早期に埋まり、マーク読み取り誤差が発生するまでの
マークの寿命が短くなってしまい、実用的でない。
Refer to FIG. 9 However, when a mark is formed using a laser, a crown-shaped peak 5 is formed around the marking groove 4, as shown in FIG. When used, the adhesion between the photomask 3 and the substrate 1 deteriorates, resulting in a decrease in resolution. If the depth of the marking groove 4 is made shallow, the height of the crown-shaped peak 5 will be lowered, and the degree of deterioration of the adhesion between the photomask 3 and the substrate l will be reduced, but the marking groove 4 will be deposited during the deposition process. This is not practical because it is quickly filled with objects and the life of the mark until mark reading errors occur is shortened.

本発明の目的は、この欠点を解消することにあり、堆積
物によって読み取り誤差が生ずるまでのマークの寿命が
長くなり、かつ、フォトマスクと基板との密着性を良好
に保って解像度を向上するようにされた半導体装置用基
板を提供することにある。
The purpose of the present invention is to eliminate this drawback by extending the life of the mark until reading errors occur due to deposits, and improving resolution by maintaining good adhesion between the photomask and the substrate. An object of the present invention is to provide a substrate for a semiconductor device having the above structure.

〔課題を解決するための手段〕[Means to solve the problem]

上記の目的は、レーザが照射されて凹状のマーク(4)
が形成されるマーク形成領域(2)を有する半導体装置
用基板(1)において、前記のマーク形成領域(2)が
、前記のマーク形成時に、前記の凹状のマーク(4)周
囲部に形成される凸部(5)の頂部が半導体装置用基板
(1)の素子形成面(11)よりも高くならない程度に
半導体装置用基板(1)の素子形成面(11)より低く
形成されることによって達成される。
The purpose of the above is to make a concave mark (4) by irradiating the laser.
In a semiconductor device substrate (1) having a mark forming region (2) in which a mark is formed, the mark forming region (2) is formed around the concave mark (4) during the mark formation. By forming the top of the convex portion (5) to be lower than the element formation surface (11) of the semiconductor device substrate (1) to the extent that it does not become higher than the element formation surface (11) of the semiconductor device substrate (1). achieved.

なお、前記のマーク形成領域(2)は、基板(1)の周
辺に設けられることが好適である。
Note that the mark forming area (2) is preferably provided around the substrate (1).

〔作用〕[Effect]

第1図参照 本発明に係る半導体装置用基板においては、第1図に示
すように、マーク形成領域2が素子形成面11より1μ
程度以上低く形成されているので、レーザマーキング法
を使用して深い溝のマーク4を形成しても、その周囲に
形成されるクラウン状の山5が素子形成面11より高く
なることはないので、フォトマスク3と基板1との密着
性が良好となり、解像度が向上する。また、マーキング
溝を深く形成することができるので、堆積工程において
マーキング溝が埋まって読み取り誤差が発生するまでの
マークの寿命が長くなる。
Refer to FIG. 1 In the semiconductor device substrate according to the present invention, as shown in FIG.
Even if a deep groove mark 4 is formed using the laser marking method, the crown-shaped peak 5 formed around it will not be higher than the element forming surface 11. , the adhesion between the photomask 3 and the substrate 1 is improved, and the resolution is improved. Furthermore, since the marking groove can be formed deeply, the life of the mark is extended until the marking groove is filled in the deposition process and a reading error occurs.

〔実施例〕〔Example〕

以下、図面を参照しつ一1本発明の一実施例に係る半導
体装置用基板について説明する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS A semiconductor device substrate according to an embodiment of the present invention will be described below with reference to the drawings.

第2図参照 第2図は、例えばシリコン単結晶インゴット6の平面図
である。シリコン単結晶インゴット6の外周を研磨して
、−例として、外径150mmに仕上げ、その外周にシ
リコン単結晶インゴット6の中心軸に平行にノツチ7を
形成する。なお、ノツチに代えて、オリエンテーション
フラットを形成する場合もある。
See FIG. 2 FIG. 2 is a plan view of a silicon single crystal ingot 6, for example. The outer periphery of the silicon single crystal ingot 6 is polished to, for example, an outer diameter of 150 mm, and a notch 7 is formed on the outer periphery parallel to the central axis of the silicon single crystal ingot 6. Note that an orientation flat may be formed instead of the notch.

第3図参照 第3図は、シリコン単結晶インゴット6に形成されたノ
ツチ7の詳細図であり、図示する寸法はその一例を示す
Refer to FIG. 3 FIG. 3 is a detailed view of the notch 7 formed in the silicon single crystal ingot 6, and the dimensions shown in the figure represent an example.

第4図参照 次いで、前記単結晶インゴット6をスライスし、外周部
の面取りと両面のラッピングとをなした後、ラッピング
による損傷を除去するため、硝酸とフッ酸と醋酸との混
合液を使用してエツチングをなし、−例として、第4図
にその断面を示すように、直径150酎、厚さ6607
mの基板1を形成する。
Refer to FIG. 4 Next, after slicing the single crystal ingot 6, chamfering the outer periphery and lapping both sides, a mixed solution of nitric acid, hydrofluoric acid, and acetic acid was used to remove damage caused by lapping. For example, as shown in the cross section in Fig. 4, the diameter is 150 mm and the thickness is 660 mm.
m substrates 1 are formed.

第5図、第6図参照 第6図は、第5図の矢印A方向から見た図である。See Figures 5 and 6. FIG. 6 is a view seen from the direction of arrow A in FIG.

一例として、基板1の周辺に、円弧の高さが10踵であ
る扇形のマーク形成領域2を2箇所設ける場合について
説明する。基板1の全面にレジスト膜8を形成し、フォ
トリソグラフィー法を使用して、これをバターニングし
、基板1の片面のマーク形成領域2を除く領域にレジス
ト膜8を残留し、硝酸とフン酸と醋酸との混合液を使用
して、第6図において点線をもって示すところまで、約
20μ厚エツチングする。
As an example, a case will be described in which two fan-shaped mark formation regions 2 each having an arc height of 10 heels are provided around the substrate 1. A resist film 8 is formed on the entire surface of the substrate 1, and this is patterned using a photolithography method, and the resist film 8 remains on one side of the substrate 1 except for the mark formation region 2. Using a mixed solution of acetic acid and acetic acid, etching is performed to a thickness of approximately 20 μm to the point indicated by the dotted line in FIG.

第7図、第8図参照 第8図は、第7図の矢印B方向から見た図であレジスト
膜8を除去し、基板lの段差の形成されている面を約1
5n厚ポリツシングすると、図示する寸法を有する基板
1が形成される。基板1のマーク形成領域2と素子形成
面11とには5nの段差が形成されるので、マーク形成
領域2にレーザマーキング法を使用してマークを形成し
ても、マーキング溝の周囲にできるクラウン状の山が素
子形成面11より高くなることはない。
See FIGS. 7 and 8. FIG. 8 is a view seen from the direction of arrow B in FIG.
After polishing to a thickness of 5n, a substrate 1 having the dimensions shown is formed. Since a step of 5n is formed between the mark forming area 2 of the substrate 1 and the element forming surface 11, even if a mark is formed in the mark forming area 2 using the laser marking method, a crown is formed around the marking groove. The peak of the shape is never higher than the element forming surface 11.

なお、マーク形成領域2は基板1の周辺に限定されるも
のではなく、その領域と形状とは自由に選択しうること
はいうまでもないが、基板1の周辺部は、堆積、エツチ
ング等の工程における品質が基板中央部より劣るため、
一般に、基板周辺部には素子が形成されないので、マー
ク形成領域は基板周辺部に形成されることが好適である
Note that the mark forming area 2 is not limited to the periphery of the substrate 1, and it goes without saying that the area and shape can be freely selected. Because the quality in the process is inferior to the center part of the board,
Generally, since no elements are formed in the periphery of the substrate, it is preferable that the mark formation region be formed in the periphery of the substrate.

〔発明の効果〕〔Effect of the invention〕

以上説明せるとおり、本発明に係る半導体装置用基板に
おいては、マーク形成領域が素子形成面より低(形成さ
れているので、レーザマーキング法を使用して溝の深い
マークを形成しても、マーキング溝の周囲に形成される
クラウン状の山が素子形成面より高くなることはないの
で、マークの寿命は長くなり、かつ、フォトマスクと基
板との密着性が良好に保たれて、解像度が向上する。
As explained above, in the semiconductor device substrate according to the present invention, the mark formation region is formed at a lower level than the element formation surface, so even if a deep groove mark is formed using the laser marking method, the marking Since the crown-shaped peaks formed around the grooves are never higher than the element formation surface, the life of the mark is extended, and the adhesion between the photomask and the substrate is maintained, improving resolution. do.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は、本発明に係る半導体装置用基板の原理図であ
る。 第2図、第4図〜第8図は、本発明の一実施例に係る半
導体装置用基板の製造工程図である。 第3図は、ノツチ部詳細図である。 第9図は、従来技術に係る半導体装置用基板の欠点を示
す側面図である。 ・クラウン状の山、 ・単結晶インゴット、 ・ノツチ、 ・レジスト膜。
FIG. 1 is a principle diagram of a substrate for a semiconductor device according to the present invention. 2 and 4 to 8 are process diagrams for manufacturing a semiconductor device substrate according to an embodiment of the present invention. FIG. 3 is a detailed view of the notch portion. FIG. 9 is a side view showing a drawback of a semiconductor device substrate according to the prior art.・Crown-shaped mountain, ・Single crystal ingot, ・Notch, ・Resist film.

Claims (1)

【特許請求の範囲】 [1]レーザが照射されて凹状のマーク(4)が形成さ
れるマーク形成領域(2)を有する半導体装置用基板(
1)において、前記マーク形成領域(2)が、前記マー
ク形成時に、前記凹状のマーク(4)周囲部に形成され
る凸部(5)の頂部が半導体装置用基板(1)の素子形
成面(11)よりも高くならない程度に半導体装置用基
板(1)の素子形成面(11)より低くされてなる ことを特徴とする半導体装置用基板。 [2]前記マーク形成領域(2)は基板(1)の周辺に
設けられてなることを特徴とする請求項1記載の半導体
装置用基板。
[Scope of Claims] [1] A semiconductor device substrate (
In 1), when the mark formation region (2) is formed, the top of the convex portion (5) formed around the concave mark (4) is located on the element formation surface of the semiconductor device substrate (1). (11) A substrate for a semiconductor device, characterized in that the substrate is made lower than the element formation surface (11) of the substrate (1) for a semiconductor device to the extent that the surface does not become higher than the surface (11). [2] The substrate for a semiconductor device according to claim 1, wherein the mark forming region (2) is provided at the periphery of the substrate (1).
JP1043037A 1989-02-27 1989-02-27 Semiconductor device substrate Pending JPH02224218A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1043037A JPH02224218A (en) 1989-02-27 1989-02-27 Semiconductor device substrate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1043037A JPH02224218A (en) 1989-02-27 1989-02-27 Semiconductor device substrate

Publications (1)

Publication Number Publication Date
JPH02224218A true JPH02224218A (en) 1990-09-06

Family

ID=12652715

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1043037A Pending JPH02224218A (en) 1989-02-27 1989-02-27 Semiconductor device substrate

Country Status (1)

Country Link
JP (1) JPH02224218A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999007016A1 (en) * 1997-08-01 1999-02-11 Infineon Technologies Ag Wafer marking
KR100965216B1 (en) * 2007-12-26 2010-06-22 주식회사 동부하이텍 laser marking method in wafer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999007016A1 (en) * 1997-08-01 1999-02-11 Infineon Technologies Ag Wafer marking
KR100965216B1 (en) * 2007-12-26 2010-06-22 주식회사 동부하이텍 laser marking method in wafer

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