| Diameter/application size | 8 inch Size callout associated with the cover ring. |
|---|---|
| Angle | 55 degrees Geometry callout listed for the ring. |
| Tabs | 2 tabs Mechanical feature called out in the description. |
| Use descriptor | Mask Indicates use in a mask or mask-related chamber component context. |
A chamber ring, cover ring, or ceramic ring is a shaped consumable or hardware component used around the wafer or electrode region.
These parts can influence plasma confinement, edge effects, shielding, or mechanical spacing, so dimensions and material must match the chamber configuration.
Ceramics are used for insulating, wear-resistant, or process-compatible surfaces.
Quartz is used where thermal stability and plasma compatibility are important.
Product reference only. Confirm fitment, revision, included components, and specifications before purchase.
No public documents were listed for this part when captured.
Prices and availability may change. Confirm details with the seller.
No available listings found for this search.
0 matching listings.
No active-status direct listings are shown on this page.
Auction listing history. Direct marketplace listings are shown separately.
Amounts without an established currency are retained in the history below and excluded from monetary comparisons. Bids, public listing prices and accepted amounts are distinct; no currency conversion is applied.
| Time recorded | Listing | Observation | Public price | Recorded acceptance |
|---|---|---|---|---|
| Nov 14, 2022 04:00 UTC | AMAT 0021-21617 COVER, RING 8" 55 DEG, 2 TABS, MASK - New | Completed listing price | 600 (currency not captured) | Not established |
| Mar 7, 2019 03:23 UTC | AMAT 0021-21617 COVER, RING 8" 55 DEG, 2 TABS, MASK - New | Completed listing price | 1800 (currency not captured) | Not established |
| Feb 5, 2019 03:22 UTC | AMAT 0021-21617 COVER, RING 8" 55 DEG, 2 TABS, MASK - New | Completed listing price | 1800 (currency not captured) | Not established |
| Jan 6, 2019 03:22 UTC | AMAT 0021-21617 COVER, RING 8" 55 DEG, 2 TABS, MASK - New | Completed listing price | 1800 (currency not captured) | Not established |
| Dec 7, 2018 03:22 UTC | AMAT 0021-21617 COVER, RING 8" 55 DEG, 2 TABS, MASK - New | Completed listing price | 1800 (currency not captured) | Not established |
| Nov 7, 2018 03:22 UTC | AMAT 0021-21617 COVER, RING 8" 55 DEG, 2 TABS, MASK - New | Completed listing price | 2000 (currency not captured) | Not established |
| Oct 8, 2018 03:22 UTC | AMAT 0021-21617 COVER, RING 8" 55 DEG, 2 TABS, MASK - New | Completed listing price | 2000 (currency not captured) | Not established |
| Sep 8, 2018 03:21 UTC | AMAT 0021-21617 COVER, RING 8" 55 DEG, 2 TABS, MASK - New | Completed listing price | 2000 (currency not captured) | Not established |
| Aug 9, 2018 03:21 UTC | AMAT 0021-21617 COVER, RING 8" 55 DEG, 2 TABS, MASK - New | Completed listing price | 2000 (currency not captured) | Not established |
| Jun 10, 2018 00:12 UTC | AMAT 0021-21617 COVER, RING 8" 55 DEG, 2 TABS, MASK - New | Completed listing price | 2000 (currency not captured) | Not established |
| Apr 6, 2018 00:02 UTC | AMAT 0021-21617 COVER, RING 8" 55 DEG, 2 TABS, MASK | Completed listing price | 2000 (currency not captured) | Not established |
| Sep 8, 2017 02:41 UTC | AMAT 0021-21617 COVER, RING 8" 55 DEG, 2 TABS, MASK | Completed listing price | 2000 (currency not captured) | Not established |
| Mar 13, 2015 17:07 UTC | 0021-21617 COVER RING, 8"55 DEG. 2TABS MASK | Completed listing price | 1575 (currency not captured) | Not established |
Public listing prices, direct recorded sale prices and recorded accepted Best Offer amounts remain distinct. Quantities are source estimates. No aggregate sales total or average is inferred.
Prices and availability may change. Confirm details with the seller.
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Legacy record; no enhanced status check captured
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Best Offer lookup was not verified; no accepted-price claim is made.
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Legacy record; no enhanced status check captured
Check time or freshness is unknown; current availability is unknown.
Best Offer lookup was not verified; no accepted-price claim is made.
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Legacy record; no enhanced status check captured
Check time or freshness is unknown; current availability is unknown.
Best Offer lookup was not verified; no accepted-price claim is made.
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Legacy record; no enhanced status check captured
Check time or freshness is unknown; current availability is unknown.
Best Offer lookup was not verified; no accepted-price claim is made.
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Legacy record; no enhanced status check captured
Check time or freshness is unknown; current availability is unknown.
Best Offer lookup was not verified; no accepted-price claim is made.
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Legacy record; no enhanced status check captured
Check time or freshness is unknown; current availability is unknown.
Best Offer lookup was not verified; no accepted-price claim is made.
View on eBayLegacy public listing price; currency may not have been captured.
Legacy record; no enhanced status check captured
Check time or freshness is unknown; current availability is unknown.
Best Offer lookup was not verified; no accepted-price claim is made.
View on eBayLegacy public listing price; currency may not have been captured.
Legacy record; no enhanced status check captured
Check time or freshness is unknown; current availability is unknown.
Best Offer lookup was not verified; no accepted-price claim is made.
View on eBayLegacy public listing price; currency may not have been captured.
Legacy record; no enhanced status check captured
Check time or freshness is unknown; current availability is unknown.
Best Offer lookup was not verified; no accepted-price claim is made.
View on eBayLegacy public listing price; currency may not have been captured.
Legacy record; no enhanced status check captured
Check time or freshness is unknown; current availability is unknown.
View on eBayLegacy public listing price; currency may not have been captured.
Legacy record; no enhanced status check captured
Check time or freshness is unknown; current availability is unknown.
Best Offer lookup was not verified; no accepted-price claim is made.
View on eBayOriginal public listing price is shown separately from recorded accepted amounts.
Legacy record; no enhanced status check captured
Check time or freshness is unknown; current availability is unknown.
Acceptance recorded by the source; fulfillment is not verified. Availability has not been rechecked; current availability is unknown. Checked Aug 31, 2026 18:18 UTC.
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