摘要:
An exposure method for exposing a resist film disposed on one surface of a wafer includes a first exposure step of locating an exposure mask at a first predetermined position with respect to the wafer, and exposing the resist film. The exposure method further includes a second exposure step of displacing the exposure mask relative to the wafer by a predetermined dimension in a predetermined direction to locate the exposure mask at a second predetermined position, and exposing the resist film.
摘要:
An exposure method for exposing a resist film disposed on one surface of a wafer includes a first exposure step of locating an exposure mask at a first predetermined position with respect to the wafer, and exposing the resist film. The exposure method further includes a second exposure step of displacing the exposure mask relative to the wafer by a predetermined dimension in a predetermined direction to locate the exposure mask at a second predetermined position, and exposing the resist film.
摘要:
To divide into individual devices efficiently in dicing a wafer without causing quality of the devices to lower, a wafer processing method includes steps of coating a rear surface of the wafer with a resist film, exposing and sensitizing portions of the resist film other than regions corresponding to the streets; and supplying a silylation agent onto a surface of the resist film and silylating the resist film in a sensitized region. In an etching unit, an oxygen- or chlorine-containing gas is plasmatized and supplied to a rear surface of the wafer coated with a silylated resist film, and the resist film in an unsilylated regions corresponding to the streets is ashed and removed. A stable fluoride gas is plasmatized and supplied to the rear surface of the wafer, and the resist film in the regions corresponding to the streets is etch-removed to divide the wafer W into individual devices.
摘要:
To divide into individual devices efficiently in dicing a wafer without causing quality of the devices to lower, a wafer processing method includes steps of coating a rear surface of the wafer with a resist film, exposing and sensitizing portions of the resist film other than regions corresponding to the streets; and supplying a silylation agent onto a surface of the resist film and silylating the resist film in a sensitized region. In an etching unit, an oxygen- or chlorine-containing gas is plasmatized and supplied to a rear surface of the wafer coated with a silylated resist film, and the resist film in an unsilylated regions corresponding to the streets is ashed and removed. A stable fluoride gas is plasmatized and supplied to the rear surface of the wafer, and the resist film in the regions corresponding to the streets is etch-removed to divide the wafer W into individual devices.
摘要:
A wafer processing method transfers an optical device layer (ODL) in an optical device wafer (ODW) to a transfer substrate. The ODL is formed on the front side of an epitaxy substrate through a buffer layer, and is partitioned by a plurality of crossing streets to define a plurality of regions where optical devices are formed. The transfer substrate is bonded to the front side of the ODL. The transfer substrate and the ODL are cut along the streets. The transfer substrate is attached to a supporting member, and a laser beam is applied to the epitaxy substrate from the back side of the epitaxy substrate to the unit of the ODW and the transfer substrate. The focal point of the laser beam is set in the buffer layer, thereby decomposing the buffer layer. The epitaxy substrate is then peeled off from the ODL.
摘要:
A processing method for a package substrate having a base substrate partitioned by a plurality of crossing division lines to form a plurality of chip forming areas where a plurality of semiconductor chips are respectively formed and molded with resin. The package substrate has a resin surface and an electrode surface opposite to the resin surface. The processing method includes a warp correcting step of cutting the package substrate from the resin surface or the electrode surface along the division lines by using a cutting blade to form a cut groove, thereby correcting a warp of the package substrate, and a grinding step of grinding the resin surface of the package substrate in the condition where the electrode surface of the package substrate is held on a holding table after performing the warp correcting step, thereby reducing the thickness of the package substrate to a predetermined thickness.
摘要:
An optical device wafer processing method for dividing an optical device wafer into individual optical devices along a plurality of crossing streets formed on the front side of the wafer. The wafer is composed of a substrate and an optical device layer formed on the front side of the substrate. The individual optical devices are respectively formed in a plurality of regions partitioned by the streets. The optical device wafer processing method includes the steps of cutting the back side of the substrate along each street by using a cutting blade to thereby form a first cut groove as a first break start point on the back side of the substrate along each street, cutting the front side of the wafer along each street by using a cutting blade after forming the first cut groove to thereby form a second cut groove as a second break start point on the front side of the wafer along each street so that the second cut groove has a depth reaching the front side of the substrate, and applying an external force to the wafer after forming the second cut groove to thereby break the wafer along each street where the first and second cut grooves are formed, thereby dividing the wafer into the individual optical devices.
摘要:
A wafer processing method of processing a wafer having on a front surface a device area where a plurality of devices are formed by being sectioned by predetermined dividing lines, and an outer circumferential redundant area surrounding the device area, includes the steps of: sticking a protection tape to the front surface of the wafer; holding a protection tape side of the wafer by a rotatable chuck table, positioning a cutting blade on a rear surface of the wafer, and rotating the chuck table to cut a boundary portion between the device area and the outer circumferential redundant area to form a separation groove; grinding only the rear surface of the wafer corresponding to the device area to form a circular recessed portion to leave the ring-like outer circumferential redundant area as a ring-like reinforcing portion, the wafer being such that the device area and the ring-like outer circumferential redundant area are united by the protection tape; and conveying the wafer supported by the ring-like reinforcing portion via the protection tape.
摘要:
A method of processing a wafer having a plurality of streets formed on the front surface in a lattice pattern and a plurality of devices formed in a plurality of areas sectioned by the plurality of streets, comprising an adhesive tape amounting step for mounting the front surface of the outer peripheral portion of an adhesive tape having an adhesive layer on the front surface and a plurality of via holes onto an opening of an annular frame to cover it; a frame fixing step for placing the rear surface of the adhesive tape mounted on the annular frame on the chuck table for suction-holding a workpiece of a processing machine and fixing the annular frame; a wafer affixing step for placing the wafer on the front surface of the wafer affixing area of the adhesive tape, suction-holding the adhesive tape on the suction-holding area of the chuck table by exerting suction-force to the suction-holding area, and sucking the wafer to affix it to the front surface of the adhesive tape; and a processing step for processing the wafer along the streets.
摘要:
A semiconductor wafer processing method for planarizing an additional layer formed on the front side of a semiconductor wafer. First, the wafer is held on a chuck table included in a cutting device in the condition where the additional layer is exposed, and a table base supporting the chuck table is moved toward a working position. In concert with the movement of the table base, the exposed surface of the additional layer is cut by a bit of a cutting tool rotationally driven by a spindle motor. Thereafter, the exposed surface of the additional layer is polished by a polishing device to planarize the exposed surface of the additional layer.