Disco Corporation

Yoshiteru Nishida

Hiroyuki Takahashi

Kenta Chito

Hidekazu Iida

Susumu Yokoo

Kenji Okazaki

Yoshio Watanabe

Tomotaka Tabuchi

Tomohiro Yamada

Youngsuk Kim

Satoshi Kumazawa

Kentaro Wada

Ryoko Fujiya

Siry Milan

Susumu Yakoo

A wafer processing method includes: a resin film coating step of coating an upper surface of a wafer with a water-soluble resin and coating a dicing tape exposed between the wafer and a frame with a water-soluble resin, and solidifying the water-soluble resin to form a resin film, a partial resin film removing step of removing the resin film from regions to be divided of the wafer to partially expose the upper surface of the wafer, an etching step of subjecting the regions to be divided of the wafer to plasma etching to divide the wafer into individual device chips, and a whole resin film removing step of cleaning a frame unit to remove wholly the resin film.

Wafer processing method

There is provided a processing method of a wafer having a functional layer on a front surface side. The processing method includes a laser processing step of forming laser processed grooves along streets while removing the functional layer along the streets by executing irradiation with a laser beam and a cut groove forming step of forming cut grooves inside the laser processed grooves along the streets by cutting the wafer by a cutting blade. The processing method also includes a grinding step of causing the cut grooves to be exposed on a back surface side of the wafer and dividing the wafer into plural device chips by grinding the back surface side of the wafer and thinning the wafer and a processing distortion removal step of supplying a gas in a plasma state to the back surface side of the wafer and removing processing distortion.

Processing method of wafer

A method of processing a wafer includes a grinding step of grinding a wafer that has first insulating films covering via electrodes, from a reverse side thereof, an electrode protruding step of protruding the via electrodes covered with the first insulating films from the reverse side by way of etching, a distorted layer forming step of forming a distorted layer on the reverse side of the wafer, an insulating film forming step of forming a second insulating film on the reverse side of the wafer, and an electrode forming step of removing the first insulating films and the second insulating film from the regions where they overlap the via electrodes, and forming reverse-side electrodes connected to the via electrodes.

Method of processing a wafer

An electrostatic chuck is provided and has a holding surface for holding a wafer with a tape attached to one side of the wafer where the tape is in contact with the holding surface. The electrostatic chuck includes a disk-shaped member having a plurality of fine holes communicating with a vacuum source, where the fine holes are exposed to the holding surface. The disk-shaped member also includes a plurality of asperities formed on the holding surface and connected to the fine holes, and an electrode embedded in the disk-shaped member. The vacuum source is operated to produce a vacuum on the holding surface through the fine holes and thereby hold the wafer through the tape on the holding surface under suction, where the asperities formed on the holding surface function as a suction passage communicating with the fine holes.

Electrostatic chuck

A method for processing a wafer in which patterns including a metal layer are formed on streets. The method includes: a step of applying a laser beam along the streets formed with the patterns to form laser processed grooves while removing the patterns; a step of forming cut grooves having a depth in excess of a finished thickness of the wafer, inside the laser processed grooves; a step of grinding the back surface side of the wafer to thin the wafer to the finished thickness and to expose the cut grooves to the back surface of the wafer, thereby dividing the wafer into a plurality of device chips; a step of removing a crushed layer formed on the back surface side of the wafer; and a step of forming a strain layer on the back surface side of the wafer by plasma processing using an inert gas.

A method for processing a wafer in which patterns including a metal layer are formed on streets. The method includes: a step of applying a laser beam along the streets formed with the patterns to form laser processed grooves having a depth in excess of a finished thickness of the wafer while removing the patterns; a step of grinding a back surface side of the wafer to thin the wafer to the finished thickness, and to expose the laser processed grooves to the back surface of the wafer, thereby dividing the wafer into a plurality of device chips; a step of removing a crushed layer formed on the back surface side of the wafer; and a step of forming a strain layer on the back surface side of the wafer by plasma processing using an inert gas.

A method of processing a wafer includes a plasma etching step of supplying an etching gas in a plasma state to the wafer to remove processing strains, debris, or modified layers. The plasma etching step includes turning an etching gas into a plasma state outside of a vacuum chamber which houses the wafer therein and delivering the etching gas in the plasma state into the vacuum chamber through a supply nozzle connected to the vacuum chamber.

Method of processing wafer

A workpiece has a plurality of low-dielectric-constant insulation films and a metallic pattern stacked on a surface of a semiconductor substrate. Devices are formed in a plurality of regions partitioned by streets formed in a grid pattern. Surfaces of the devices formed on the workpiece are covered with a surface protective member, leaving the streets exposed. A dispersion of abrasive grains in an etching liquid capable of dissolving the metallic pattern is blasted against the workpiece together with compressed gas so as to remove the low-dielectric-constant insulation films and the metallic pattern on the streets, thereby exposing the semiconductor substrate. The workpiece is divided with the semiconductor substrate exposed by the wet blasting step subjected to dry etching so as to divide the workpiece along the streets.

Processing method for workpiece

A wafer processing method includes forming a resist film on the front side of a wafer in an area except division lines, plasma etching the wafer to form a groove on the front side of the wafer along each division line, the groove having a depth greater than a finished thickness, removing the resist film from the front side of the wafer by cleaning, and grinding the back side of the wafer to reduce the thickness of the wafer to the finished thickness, so that the groove is exposed to the back side of the wafer to thereby divide the wafer into individual device chips. In the resist film removing step, a chemical fluid is sprayed to the resist film formed on the front side of the wafer, thereby removing the resist film.

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Tokyo, Japan

Yoshiteru Nishida