Patent ID: 9150961
Filing Date: 2015-10-06
Classification: C23C,H01J

Abstract:
1. A gas injection system for providing multiple process gases to a microbeam processing system having a sample chamber with a controlled environment, comprising: multiple gas sources for providing multiple process gases; a plurality of flow rate control valves, each flow rate control valve associated with one of the multiple gas sources to adjust the flow rate of gas from the corresponding gas source; a plurality of shut off valves, each shut off valve associated with one of the multiple gas sources and positioned inside the sample chamber; a set of first gas conduits, each first conduit conducting gas from one of the flow rate control valves to the corresponding shut off valve; a set of second gas conduits, each second gas conduit conducting gas from the corresponding shut off valve into the controlled environment in the sample chamber; and an airtight cabinet extending through the wall of the sample chamber and connected to the controlled environment in the sample chamber, the airtight cabinet maintaining at least some of the multiple gas sources, the plurality of flow rate control valves, and the plurality of shut-off valves, in the controlled environment during operation and the airtight cabinet being isolatable from the sample chamber for replacing or refilling gas source; in which there are no intervening valves between the shut off valve and the controlled environment in the sample chamber.