Ultrasil, LLC
3527 Breakwater Ave, Hayward, CA 94545
Operating signal within 12 months from two or more independent sources.
What they make
Semiconductor and Related Device Manufacturing334413Ultrasil LLC manufactures Silicon on Insulator (SOI) wafers, double and triple bonded wafers, and double-sided polished (DSP) and single-sided polished (SSP) wafers. The company performs oxidation, back grinding, and bonding processes, and uses simultaneous CMP polishing machines to polish silicon wafers. The text names ISO as a certification.
SUMMARIZED FROM THE COMPANY’S OWN WEBSITE
Where it is
Other plants nearby
| Facility | City | Industry | Status | Distance |
|---|---|---|---|---|
| East Asia Investment LLC Dba Ultrasil LLC | Hayward | Semiconductor and Related Device Manufacturing 334413 | UNVERIFIED | 0.0 KM |
| C3 Nano, Incorporated | Hayward | Semiconductor and Related Device Manufacturing 334413 | UNVERIFIED | 0.2 KM |
| Alphabet Energy INC | Hayward | Semiconductor and Related Device Manufacturing 334413 | UNVERIFIED | 0.5 KM |
| C3nano | Hayward | Semiconductor and Related Device Manufacturing 334413 | UNVERIFIED | 0.5 KM |
| EKC Technology - Hayward Eden | Hayward | Semiconductor and Related Device Manufacturing 334413 | LIKELY ACTIVE | 0.5 KM |
Also at this address
1 other record shares this street address. Separate filings can describe distinct businesses on one site, or the same plant recorded by different agencies, so every record is kept rather than merged away.
WHERE THIS RECORD COMES FROM — 3 FEDERAL SOURCES, 8 FIELDS
Every fact on this page traces to a public federal filing. The table below names which register holds this facility, whether that register proves the plant operates or only that it exists, and when each of them last saw it.
EPA cross-references this facility in CA-ENVIROVIEW, RCRAINFO · EPA site type STATIONARY.
| Source | Evidence | First seen | Last seen |
|---|---|---|---|
| COMPANY SITE | OPERATING | JUL 2026 | AUG 2026 |
| SAM GOV | OPERATING | DEC 2025 | DEC 2025 |
| EPA FRS | EXISTENCE | OCT 2015 | OCT 2015 |
FIELD BY FIELD — WHICH SOURCE SUPPLIED WHAT
| FIELD | SOURCE | SIGNAL |
|---|---|---|
| ADDRESS LINE1 | EPA FRS | JUL 2026 |
| ADDRESS LINE1 | SAM GOV | DEC 2025 |
| CAGE CODE | SAM GOV | DEC 2025 |
| CITY | EPA FRS | JUL 2026 |
| CITY | SAM GOV | DEC 2025 |
| GEOM | EPA FRS | JUL 2026 |
| NAME | EPA FRS | JUL 2026 |
| NAME | SAM GOV | DEC 2025 |
| REGISTRATION EXPIRATION | SAM GOV | DEC 2025 |
| STATE | EPA FRS | JUL 2026 |
| STATE | SAM GOV | DEC 2025 |
| WEBSITE | SAM GOV | DEC 2025 |
Status is computed from independent sources; nothing here is self-reported unless marked Claimed.