WO1998007190A1 - Verfahren zum trennen einer halbleiterscheibe - Google Patents
Verfahren zum trennen einer halbleiterscheibe Download PDFInfo
- Publication number
- WO1998007190A1 WO1998007190A1 PCT/DE1997/001756 DE9701756W WO9807190A1 WO 1998007190 A1 WO1998007190 A1 WO 1998007190A1 DE 9701756 W DE9701756 W DE 9701756W WO 9807190 A1 WO9807190 A1 WO 9807190A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- semiconductor wafer
- semiconductor
- cutting
- cut
- cover layer
- 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.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P54/00—Cutting or separating of wafers, substrates or parts of devices
Definitions
- the invention relates to a method for separating a semiconductor wafer provided with a multiplicity of optoelectronic semiconductor structures into a number of individual chips by means of cutting-off by means of a cutting tool, the cutting tool and the semiconductor wafer being guided along cutting tracks relative to one another.
- semiconductor wafers can contain a large number of individual chips that must be separated or separated before assembly.
- the cutting process for integrated circuits that is used almost exclusively today is sawing, more precisely cutting grinding, which by far provides the most precise and cleanest chip edges and, in contrast to scribing or breaking processes, delivers good results regardless of the crystal orientation of the semiconductor wafer.
- the principle of the cut-off process is based on the fact that the semiconductor wafer is attached to a table that can be moved in the X direction and is moved under a high-speed rotating diamond grinding disk. To avoid impairing the electronic and optical properties of the diode structures after the cut-off process has been carried out, the generation of the cleanest possible side edges of the individual chips is necessary.
- the chip flanks produced in this way are usually wet-chemically etched after being separated by means of cut-off grinding in order to remove the crystal damage produced during cut-off grinding.
- This is necessary in particular in the case of luminescent diodes, on the one hand to improve the outcoupling of light and, on the other hand, to crystal damage which is induced in operation due to the damage generated during separation and which shorten the life of the luminescent diode avoid.
- this surface must be protected.
- the invention is based on the object of specifying a method for separating a semiconductor wafer provided with a large number of optoelectronic semiconductor component structures, in particular diode structures, into a number of individual chips by means of cut-off grinding by means of a cutting tool, in which the cut-off result is impaired by those necessary for the later chip flanks Front cover can be avoided.
- the cutting tool does not come into contact with the material of the cover layer during cut-off grinding, and the cut-off result is not impaired.
- the chip flanks are etched after the semiconductor wafer has been separated, the chip surface being protected by the cover layer against attack by the etchant used.
- the cover layer consists of a photoresist material
- the structuring of the cover layer is carried out by means of a phototechnical exposure process by means of a photomask and a subsequent development process.
- the entire surface deposition and the phototechnical exposure and development processes of the photoresist can be carried out according to semiconductor standard process steps known per se, using a suitably structured photomask.
- the thickness of the covering layer deposited over the entire surface is at least about 5 ⁇ m.
- the method according to the invention is used in particular in the case of III-V semiconductor materials, in particular in the production of luminescent diodes.
- FIG. 1 shows a schematic sectional view of a semiconductor wafer before the semiconductor chips are separated
- FIG. 2 shows a schematic sectional view of the semiconductor wafer during the cut-off process by means of a cutting tool
- Figure 3 is a schematic sectional view of the semiconductor wafer after singulation and chip edge etching.
- FIG. 1 schematically shows a section of a semiconductor wafer 1 provided with a large number of diode structures before it is separated into the number of individual chips.
- the semiconductor wafer 1 consists of a III-V semiconductor base material, such as in particular GaAlAs or InP, in which luminescence diodes with a schematically indicated pn junction 2 are formed.
- the reference number 3 schematically designates the front-side metallization formed on the main surface 4 of the semiconductor wafer, the reference number 5 denotes a rear-side metallization deposited on the rear surface of the semiconductor wafer.
- a photoresist layer 7 is deposited over the entire surface, preferably in a centrifugal process, and by means of a correspondingly designed photo mask according to semiconductor standard method phototechnically exposed, then developed, and then removed along the cutting tracks 6, on which the cut-off process will be carried out later.
- FIG. 2 shows the subsequent cut-off process by means of a diamond grinding wheel 8 which, as shown, is guided along the cutting tracks 6 in the sense of completely cutting through the semiconductor wheel 1. It is readily apparent from FIG. 2 that the diamond grinding wheel 8 does not come into contact with the photoresist layer 7 during the cut-off process, as a result of which the cut-off result is not impaired.
- FIG. 3 finally shows the semiconductor chips 9 and 10 which have been isolated after the cut-off grinding process has been carried out and the chip flanks 11 have subsequently been etched.
Landscapes
- Led Devices (AREA)
- Dicing (AREA)
- Weting (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE59705221T DE59705221D1 (de) | 1996-08-14 | 1997-08-14 | Verfahren zum trennen einer halbleiterscheibe |
| JP10509301A JP2000516398A (ja) | 1996-08-14 | 1997-08-14 | 半導体ウェーハを分離する方法 |
| EP97937458A EP0944920B1 (de) | 1996-08-14 | 1997-08-14 | Verfahren zum trennen einer halbleiterscheibe |
| US09/250,866 US6281031B1 (en) | 1996-08-14 | 1999-02-16 | Method of severing a semiconductor wafer |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19632815.2 | 1996-08-14 | ||
| DE19632815 | 1996-08-14 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US09/250,866 Continuation US6281031B1 (en) | 1996-08-14 | 1999-02-16 | Method of severing a semiconductor wafer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1998007190A1 true WO1998007190A1 (de) | 1998-02-19 |
Family
ID=7802651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE1997/001756 Ceased WO1998007190A1 (de) | 1996-08-14 | 1997-08-14 | Verfahren zum trennen einer halbleiterscheibe |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6281031B1 (de) |
| EP (1) | EP0944920B1 (de) |
| JP (1) | JP2000516398A (de) |
| DE (1) | DE59705221D1 (de) |
| WO (1) | WO1998007190A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6465353B1 (en) * | 2000-09-29 | 2002-10-15 | International Rectifier Corporation | Process of thinning and blunting semiconductor wafer edge and resulting wafer |
| US20040245216A1 (en) * | 2003-06-06 | 2004-12-09 | Chien-Shing Pai | Devices and method of their manufacture |
| CN113224005A (zh) * | 2021-04-08 | 2021-08-06 | 深圳市德明利光电有限公司 | 一种芯片切割道工艺方法 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3335395A1 (de) * | 1983-09-29 | 1985-04-18 | Siemens AG, 1000 Berlin und 8000 München | Verfahren zur verarbeitung von halbleiterbauelementen |
| US5171716A (en) * | 1986-12-19 | 1992-12-15 | North American Philips Corp. | Method of manufacturing semiconductor device with reduced packaging stress |
| EP0661737A1 (de) * | 1993-03-29 | 1995-07-05 | Texas Instruments Incorporated | Schutzband im Karree und dieses verwendendes Verfahren |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4476620A (en) * | 1979-10-19 | 1984-10-16 | Matsushita Electric Industrial Co., Ltd. | Method of making a gallium nitride light-emitting diode |
| JPS61180442A (ja) * | 1985-02-05 | 1986-08-13 | Toshiba Corp | 半導体装置の製造方法 |
| GB2172141B (en) * | 1985-03-08 | 1988-11-16 | Stc Plc | Single heterostructure laser chip manufacture |
| DE4036578C2 (de) | 1990-11-16 | 1993-12-16 | Man Nutzfahrzeuge Ag | Verfahren zur Verzögerung eines Schiffsantriebes, insbesondere bei einem Not-Stop-Manöver, sowie Vorrichtung zur Durchführung des Verfahrens |
-
1997
- 1997-08-14 EP EP97937458A patent/EP0944920B1/de not_active Expired - Lifetime
- 1997-08-14 WO PCT/DE1997/001756 patent/WO1998007190A1/de not_active Ceased
- 1997-08-14 JP JP10509301A patent/JP2000516398A/ja not_active Ceased
- 1997-08-14 DE DE59705221T patent/DE59705221D1/de not_active Expired - Fee Related
-
1999
- 1999-02-16 US US09/250,866 patent/US6281031B1/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3335395A1 (de) * | 1983-09-29 | 1985-04-18 | Siemens AG, 1000 Berlin und 8000 München | Verfahren zur verarbeitung von halbleiterbauelementen |
| US5171716A (en) * | 1986-12-19 | 1992-12-15 | North American Philips Corp. | Method of manufacturing semiconductor device with reduced packaging stress |
| EP0661737A1 (de) * | 1993-03-29 | 1995-07-05 | Texas Instruments Incorporated | Schutzband im Karree und dieses verwendendes Verfahren |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0944920B1 (de) | 2001-10-31 |
| DE59705221D1 (de) | 2001-12-06 |
| JP2000516398A (ja) | 2000-12-05 |
| US6281031B1 (en) | 2001-08-28 |
| EP0944920A1 (de) | 1999-09-29 |
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