Device for reorienting semiconductor crystals with a pn junction

Abstract

This utility model relates to semiconductor manufacturing and can be used in the manufacture of rectifier diodes. The technical result of this utility model is the simultaneous reorientation of multiple p-n junction semiconductor crystals. This is achieved by the device being a cylinder with two rows of slots on the side surface, into which p-n junction semiconductor crystals are installed. The slots communicate through openings with the cylinder's interior, where a vacuum is created to hold the crystals when the cylinder is rotated 180 degrees. This allows for the simultaneous reorientation of multiple p-n junction semiconductor crystals.

Description

[0001] Technical field

[0002] The claimed technical solution relates to the field of semiconductor production and can be used in the manufacture of diodes for reorienting semiconductor crystals with a pn junction.

[0003] Technology Level

[0004] Various solutions for orientation devices are known from the prior art, in particular from patent documents: SU 774911 A1 (IPC: B23Q 7 / 00), SU 655512 A1 (IPC: B24B 3 / 24), SU 618251 A1 (IPC: B23Q 7 / 00).

[0005] A common drawback of the listed devices for orienting parts is that they are not designed for simultaneous reorientation of several semiconductor crystals with a pn junction.

[0006] The essence of the utility model

[0007] The objective of the utility model is to create a device for the simultaneous reorientation of several semiconductor crystals with a pn junction.

[0008] To solve the problem and achieve the technical result, it is proposed to manufacture a cylinder with two rows of transverse cylindrical grooves along the cylinder generatrix. The rows of grooves are made on the outer side surface of the cylinder at an angle of 180 degrees relative to each other. Each row contains n grooves of the same shape and size. Each groove contains an axial hole entering the internal cavity of the cylinder, the diameter D of which is (0.3-0.8)d, where d is the diameter of the semiconductor crystal, which ensures the retention of the semiconductor crystal in the groove due to vacuum. In one of the ends of the cylinder, there is a blind axial hole of length L> 1 + k (n-1), where 1 is the distance from the end with the blind hole to the center of the nearest groove, and k is the average distance between the centers of adjacent grooves, which ensures the creation of a vacuum in all axial holes of the grooves. The other end of the cylinder is fixed in a coupling connected to the shaft of an electric motor, which ensures the rotation of the cylinder.The blind hole, together with the holes in the grooves, forms a cavity in which, during the rotation of the cylinder, a vacuum pump creates a vacuum that ensures that the semiconductor crystals are held in the grooves.

[0009] Implementation of a utility model

[0010] Fig. 1 shows an isometric view of a device for reorienting semiconductor crystals with a pn junction. Fig. 2 shows a cross-section of the device for reorienting semiconductor crystals with a pn junction. Fig. 3 shows the process of reorienting semiconductor crystals with a pn junction by rotating the cylinder by 180 degrees.

[0011] The device consists of a cylinder 1, on the outer side surface of which rows of grooves 2 are formed. In each groove 2, a hole 4 is formed, communicating with a blind axial bore 3 of cylinder 1. In one end of cylinder 1, a blind hole 3 is formed, to which a vacuum pump (not shown in the figure) is connected. The opposite end is secured in a coupling (not shown in the figure), connected to the shaft of an electric motor (not shown in the figure) and designed to transmit rotation to cylinder 1.

[0012] The device operates as follows. Using gripping tool 6, semiconductor crystals with pn-junctions 5 are placed in slots 2 of cylinder 1. When the vacuum pump is turned on, a vacuum is created through blind axial hole 3 and holes 4 in the slots in the interior of cylinder 1, thereby holding the crystals in slots 2. When cylinder 1 rotates 180 degrees, the semiconductor crystals with pn-junctions 5 located in slots 2 are flipped 180 degrees, ensuring their simultaneous reorientation.

[0013] The utility model allows for the simultaneous reorientation of several semiconductor crystals with a pn junction by creating a cylinder with rows of grooves and a cavity formed by a blind axial hole and holes in the grooves, in which the vacuum created by a vacuum pump ensures that the crystals are held when the cylinder is rotated 180 degrees.

Claims

1. A device for reorienting semiconductor crystals with a pn junction, comprising a cylinder with two rows of transverse cylindrical grooves located along the cylinder's generatrix on its outer side surface at an angle of 180 degrees relative to each other, wherein in each groove there is an axial opening communicating with the internal cavity of the cylinder formed by a blind axial opening made in one of the ends of the cylinder, with the possibility of creating a vacuum in it, ensuring that the semiconductor crystals are held in the grooves when the cylinder is rotated by 180 degrees.

2. The device according to paragraph 1, characterized in that each row contains n grooves that are identical in shape and size.

3. The device according to paragraph 1, characterized in that the length of the blind axial hole L satisfies the ratio L>1+k(n-1), where 1 is the distance from the end of the cylinder with the blind hole to the center of the nearest groove, and k is the average distance between the centers of adjacent grooves, which ensures the creation of a vacuum in all axial holes of the grooves.

4. The device according to paragraph 1, characterized in that the diameter D of the axial hole made in each groove is (0.3-0.8)d, where d is the diameter of the semiconductor crystal, which ensures that the semiconductor crystal is held in the groove due to vacuum.

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