摘要:
The intensity of light of a predetermined wavelength corresponding to the type of a protective tape joined to the surface of a semiconductor wafer is adjusted by a controller, and a holding stage for holding the semiconductor wafer is scanned rotationally. At this time, at a V notch portion for positioning formed in the semiconductor wafer, light is transmitted through the protective sheet covering the surface, which is received by a photoreception sensor. Based on the change in the reception amount of light in the photoreception sensor, the position of a detection site is specified.
摘要:
A wafer has an annular ridge formed along an outer periphery thereof to serve as a reinforcing portion, and a circuit pattern surrounded with the reinforcing portion. The wafer is placed on a wafer placement plane of a holding stage in a state that the circuit pattern is directed downward. The wafer placement plane is larger in size than the wafer. On the holding stage, a center of the wafer is aligned with a center of the holding stage in such a manner that a plurality of guide pins are engaged with relevant cutout portions formed on the reinforcing portion. Then, the holding stage rotates while suction-holding the reinforcing portion of the wafer, and simultaneously a photosensor detects a portion for alignment formed on the outer periphery of the wafer.
摘要:
An arithmetic processing part in a controller detects a position of a defect such as a chip or a crack that occurs at an outer periphery of a semiconductor wafer, and then a memory in the controller stores position information of the defect. The controller reads the position information of the defect through a network in each process. On the basis of this position information, the controller determines a direction of joining a dicing tape to the semiconductor wafer or a direction of separating a protective tape from a front face of the semiconductor wafer.
摘要:
A method of this invention involves: detecting a shape of an outer periphery of a semiconductor wafer with a first detecting device; determining a center position of the semiconductor wafer based on a detected result by the first detecting device; receiving a light beam reflected from a surface of the semiconductor wafer with a second detecting device; detecting an alignment part based on a detected result by the second detecting device to determine a position of the alignment part; and detecting a defect based on the detected result by the second detecting device to determine a position of the defect.
摘要:
A method of this invention involves: detecting a shape of an outer periphery of a semiconductor wafer with a first detecting device; determining a center position of the semiconductor wafer based on a detected result by the first detecting device; receiving a light beam reflected from a surface of the semiconductor wafer with a second detecting device; detecting an alignment part based on a detected result by the second detecting device to determine a position of the alignment part; and detecting a defect based on the detected result by the second detecting device to determine a position of the defect.
摘要:
An arithmetic processing part in a controller detects a position of a defect such as a chip or a crack that occurs at an outer periphery of a semiconductor wafer, and then a memory in the controller stores position information of the defect. The controller reads the position information of the defect through a network in each process. On the basis of this position information, the controller determines a direction of joining a dicing tape to the semiconductor wafer or a direction of separating a protective tape from a front face of the semiconductor wafer.
摘要:
A light source emits light toward a semiconductor wafer, and a light receiving sensor detects light passing a peripheral edge of the semiconductor wafer. Each coordinates of the peripheral edge of the semiconductor wafer is obtained from a result of the detection. Further, a center of the semiconductor wafer is obtained from a group of the coordinates. Then, an illumination device emits light toward the peripheral edge of the semiconductor wafer and an optical camera detects light reflected from the peripheral edge of the semiconductor wafer. A position of a “V”-shaped notch formed on the peripheral edge of the semiconductor wafer is obtained from a result of the detection. A handling position of the semiconductor wafer is determined based on the center of the semiconductor wafer and the position of the “V”-shaped notch.
摘要:
An illuminator emits light obliquely to an end of an adhesive film. A CCD camera is provided in a direction perpendicular to the adhesive film to capture an image of the light reflected irregularly from the end of the adhesive film. A black plate is provided on a back side of the adhesive film. In the image obtained by the CCD camera, therefore, only the end of the adhesive film is displayed whitely in a line shape. A position of the adhesive film is determined based on a line corresponding to the end of the adhesive film. Since the light reflected from the end of the adhesive film is utilized, the position of the adhesive film can be determined accurately irrespective of a color of the adhesive film, a color of a base film to which the adhesive film is joined, and a depth of each color.
摘要:
An alignment apparatus of this invention includes a holding stage that is larger in size than a semiconductor wafer, and an optical sensor that optically detects a position of a peripheral edge of the semiconductor wafer placed on and suction-held by the holding stage. The holding stage has a slits formed thereon vertically in a circumferential direction, and an outer periphery of the semiconductor wafer lies on the slits. The optical sensor is of a transparent type and includes a projector and a photodetector opposed vertically to each other with the slit interposed therebetween. The optical sensor measures the peripheral edge of the semiconductor wafer on the slits of the holding stage.
摘要:
An illuminator emits light obliquely to an end of an adhesive film. A CCD camera is provided in a direction perpendicular to the adhesive film to capture an image of the light reflected irregularly from the end of the adhesive film. A black plate is provided on a back side of the adhesive film. In the image obtained by the CCD camera, therefore, only the end of the adhesive film is displayed whitely in a line shape. A position of the adhesive film is determined based on a line corresponding to the end of the adhesive film. Since the light reflected from the end of the adhesive film is utilized, the position of the adhesive film can be determined accurately irrespective of a color of the adhesive film, a color of a base film to which the adhesive film is joined, and a depth of each color.