Blocker plate bypass to distribute gases in a chemical vapor deposition system
First Claim
1. An apparatus for distributing gases into a processing chamber, comprising:
- a gas distribution plate in the chamber, wherein the gas distribution plate has a plurality of apertures disposed therethrough; and
a blocker plate spaced above the gas distribution plate, wherein the blocker plate has a plurality of apertures disposed therethrough and feed through passages extending through a center region of the blocker plate;
wherein a first gas pathway is configured to deliver a first gas sequentially through the apertures of both the blocker plate and the gas distribution plate; and
wherein a second gas pathway is configured to deliver a second gas (i) around the blocker plate and through the apertures of the gas distribution plate without passing through the blocker plate, and (ii) through the feed through passages extending through a center region of the blocker plate and through the apertures of the gas distribution plate, without mixing first and second gases prior to the first gas passing through the apertures of the blocker plate.
2 Assignments
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Accused Products
Abstract
Apparatus and methods for distributing gases into a processing chamber are disclosed. In one embodiment, the apparatus includes a gas distribution plate having a plurality of apertures disposed therethrough and a blocker plate having both a plurality of apertures disposed therethrough and a plurality of feed through passageways disposed therein. A first gas pathway delivers a first gas through the plurality of apertures in the blocker plate and the gas distribution plate. A bypass gas pathway delivers a second gas through the plurality of feed through passageways in the blocker plate and to areas around the blocker plate prior to the second gas passing through the gas distribution plate.
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Citations
15 Claims
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1. An apparatus for distributing gases into a processing chamber, comprising:
- a gas distribution plate in the chamber, wherein the gas distribution plate has a plurality of apertures disposed therethrough; and
a blocker plate spaced above the gas distribution plate, wherein the blocker plate has a plurality of apertures disposed therethrough and feed through passages extending through a center region of the blocker plate;
wherein a first gas pathway is configured to deliver a first gas sequentially through the apertures of both the blocker plate and the gas distribution plate; and
wherein a second gas pathway is configured to deliver a second gas (i) around the blocker plate and through the apertures of the gas distribution plate without passing through the blocker plate, and (ii) through the feed through passages extending through a center region of the blocker plate and through the apertures of the gas distribution plate, without mixing first and second gases prior to the first gas passing through the apertures of the blocker plate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- a gas distribution plate in the chamber, wherein the gas distribution plate has a plurality of apertures disposed therethrough; and
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9. An apparatus for distributing gases into a processing chamber, comprising:
- a gas distribution plate in the chamber, wherein the gas distribution plate has a plurality of apertures disposed therethrough;
a mounting plate in the chamber, wherein the mounting plate has a plurality of radial bores therein that provide perimeter outlets to an area between the mounting plate and the gas distribution plate, the radial bores in fluid communication with a gas distribution assembly; and
a blocker plate disposed between the mounting plate and the gas distribution plate, wherein a first side of the blocker plate is in fluid communication with the gas distribution assembly and a first flow is passable through the blocker plate to the area between the mounting plate and the gas distribution plate on a second side of the blocker plate such that a second flow flows from the outlets at termini of the radial bores and from the first side of the blocker plate is passable through common ones of the apertures of the gas distribution plate without mixing the first and second flows prior to the first flow passing through the blocker plate. - View Dependent Claims (10, 11, 12, 13, 14, 15)
- a gas distribution plate in the chamber, wherein the gas distribution plate has a plurality of apertures disposed therethrough;
Specification