Retention and insulation features for lamp
Embodiments of the present disclosure generally relate to an improved retention and insulation features for lamps used as a source of heat radiation in a thermal processing chamber. In one embodiment, a process chamber is provided. The process chamber includes a lamp assembly for thermal processing of semiconductor substrates, the lamp assembly has a lamp electrical connector and a first laterally operative element, a lamp assembly housing having a passage for receiving the lamp assembly, a power distribution assembly having a receptacle for receiving the lamp electrical connector and delivering power to the lamp electrical connector, and a spacer plate disposed between the lamp assembly housing and the power distribution assembly, wherein the spacer plate has a passage contoured to allow passage of the lamp electrical connector therethrough, and the spacer plate has a retention feature configured to engage or disengage the first laterally operative element.
1. A process chamber, comprising:
a lamp comprising a lamp electrical connector and an engaging feature formed on an exterior surface of the lamp electrical connector;
a lamp assembly housing having a passage for receiving the lamp;
a power distribution assembly having a receptacle for receiving the lamp electrical connector; and
an insulating spacer plate disposed between the lamp assembly housing and the power distribution assembly, wherein the insulating spacer plate has:
a passage contoured to allow passage of the lamp electrical connector therethrough;
a channel formed within the insulating spacer plate, the channel extending in substantially perpendicular relationship with a longitudinal direction of the passage of insulating spacer plate; and
a first laterally operative element positioned to slide axially within the channel to engage or disengage the engaging feature.
2. The process chamber of claim 1 , wherein the first laterally operative element is a spring-loaded pin or bar.
3. The process chamber of claim 2 , wherein the retention feature is a circumferential notch contoured to receive the spring-loaded pin or bar.
4. The process chamber of claim 1 , wherein the receptacle of the power distribution assembly has a contact feature provided on sidewalls of the receptacle, the contact feature engages or disengages with a second laterally operative element provided on the exterior surface of the lamp electrical connector.
5. The process chamber of claim 4 , wherein the contact feature is a circumferential groove and the second laterally operative element is a cantilever-type spring contact.
6. The process chamber of claim 1 , wherein lamp assembly comprises:
a light transmissive capsule containing a filament; and
a press seal coupling to the light transmissive capsule, the press seal encapsulates and creates a hermetic seal about a metal foil disposed therein, wherein the metal foil electrically connects to the filament by a filament lead, and the metal foil is in electrical communication with the lamp electrical connector extending out of the press seal.
7. The process chamber of claim 6 , wherein the first laterally operative element is a circumferential groove provided on an exterior surface of the press seal, and the retention feature of the spacer plate is a bump or a flange radially extended outwardly from an inner surface of the spacer plate.
8. The process chamber of claim 6 , wherein at least the electrical connector exposed outside the press seal is covered by an insulating coating a cover.
9. The process chamber of claim 8 , wherein the insulating coating comprises high temperature plastic, iron oxide filled silicone, high temperature epoxy, high temperature phenolic resin, polyimide, ceramic or glass slip.
10. The process chamber of claim 8 , wherein the cover comprises high temperature plastic shrink or regular tubing, braided glass, silica, or woven ceramic fabric.