Browse Prior Art Database

Non-Orbiting Crystal Puller

IP.com Disclosure Number: IPCOM000047813D
Original Publication Date: 1983-Dec-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Murgai, A: AUTHOR

Abstract

Czochralski crystal growing equipment employing cable lift mechanisms are subject to orbiting of the crystal in addition to rotation about its axis. This results in non-circular crystal growth. By employing a telescoping mount for the seed crystal, both rotational and linear movement may be imparted to the crystal while preserving lateral stiffness to prevent orbiting. The structure is schematically illustrated in Fig. 1 wherein the crystal 10 is mounted by means of a seed holder to the cylinder 11 to which a cable 12 is attached to lift the cylinder and crystal when the lift mechanism 13 is energized. The cylinder 11 telescopes with an inner cylinder 14 and is keyed thereto (Fig. 2) so that they rotate in unison. The inner cylinder 14 is rotated by means of a motor 15, resulting in the compound movement.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Non-Orbiting Crystal Puller

Czochralski crystal growing equipment employing cable lift mechanisms are subject to orbiting of the crystal in addition to rotation about its axis. This results in non-circular crystal growth. By employing a telescoping mount for the seed crystal, both rotational and linear movement may be imparted to the crystal while preserving lateral stiffness to prevent orbiting. The structure is schematically illustrated in Fig. 1 wherein the crystal 10 is mounted by means of a seed holder to the cylinder 11 to which a cable 12 is attached to lift the cylinder and crystal when the lift mechanism 13 is energized. The cylinder 11 telescopes with an inner cylinder 14 and is keyed thereto (Fig. 2) so that they rotate in unison. The inner cylinder 14 is rotated by means of a motor 15, resulting in the compound movement.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]