Planetary rotary tray device

Abstract

The invention provides a planetary rotary tray device. The planetary rotary tray device comprises a dead plate, a sun gear and a satellite plate rail group, wherein a through hole is arranged at the center of the fixed plate; a ring-shaped concave track is arranged at the outer side of the fixed plate; a drive shaft extends into the ring-shaped concave track through the through hole; the sun gear is fixed at the frontage of the fixed plate and driven by the drive shaft to rotate around the through hole at the center of the fixed plate; the satellite plate rail group comprises a plurality of satellite plate rails which are arranged in the same radial direction; the bottoms of rotation shafts of the satellite plate rails are clamped into the ring-shaped concave track at the outer side of the fixed plate and capable of moving forwards and backwards along the ring-shaped concave track; the upper part of each satellite plate rail is provided with an upper gear; the upper gears of adjacent satellite plate rails are meshed with each other; the lower part of at least one satellite plate rail is provided with a lower gear which shares a rotation shaft with the upper gear thereof; and the lower gear and the sun gear are located at a same plane and meshed with each other. According to the planetary rotary tray device, the autorotation and revolution of each satellite plate rail can be realized.

Description

technical field [0001] The invention relates to the mechanical field, in particular to a planetary rotary tray device. Background technique [0002] Metal organic chemical vapor deposition system is a kind of equipment used for epitaxial growth of semiconductor thin films to form semiconductor devices. [0003] During the film growth process, it is necessary to heat under the tray, but due to various factors such as heat flux density and unbalanced distribution of reaction gas, the quality of the film at different positions above the tray is different. The tray in the prior art usually rotates around its center, so as to reduce the difference in film growth quality at different positions on the same radial direction above the tray. A planetary chemical vapor deposition structure allows each satellite frame to rotate independently while the tray rotates, further avoiding the difference in film quality at different distances from the epitaxial wafer to the center of the tray....

AI Technical Summary

Problems solved by technology

If the chip carrier and the satellite rack are driven separately, the driver program in a multi-chip device will be more complicated

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