Ebara dry vacuum pumps: independent brand profile
Ebara is a large Japanese engineering group best known for water pumps and compressors, but in semiconductor fabs it is one of the leading names in dry vacuum pumps. This profile covers the verifiable facts, how AI assistants describe Ebara’s vacuum business, and why it barely shows up in search data.
Independent profile by Vacuum Engineering Tools. We are not affiliated with Ebara, receive no payment and do not sell pumps. Quotes are the opinions of individual users, not statements of fact by us. Brand names belong to their respective owners.
In short
Ebara Corporation (Ota-ku, Tokyo; founded November 1912 by Issei Hatakeyama) is a publicly listed Nikkei 225 company that makes pumps, compressors and turbines and owns the US turbomachinery maker Elliott. Its precision machinery business supplies multi-stage dry vacuum pumps (EV and A series among others) and turbomolecular pumps to semiconductor fabs. Refurbishers describe its ESA and EV-A platforms as versatile and reliable for clean to medium-duty processes. There is no public owner discussion on Reddit.
Verified facts
What users say
A search of Google’s index of reddit.com for Ebara vacuum pumps found no relevant threads. That is typical for semiconductor fab equipment: the buyers are equipment and facilities engineers who discuss suppliers internally, not on public forums.
Reddit blocks automated access, so thread titles, links and previews come from Google’s index of reddit.com (October 2026). Previews are excerpts, not the full comment.
From specialist forums
Used and refurbished pumps from this maker are traded by specialist rebuilders, which is where most of its public footprint lies.
No quotable forum posts found.
AI fact-check: what ChatGPT, Gemini, Perplexity and Claude say
On 9 October 2026 we asked all four assistants the same question (who owns Ebara, headquarters, founding, best-known series and what buyers say) and checked every answer against the manufacturer’s own pages.
| Question | ChatGPT (gpt-5.5) | Gemini (3.5 Flash) | Perplexity (Sonar) | Claude (Sonnet 5.5) | Verified |
|---|---|---|---|---|---|
| Who owns it? | ✓ Ebara Corp., Precision Machinery | ✓ Ebara Corp., Precision Machinery | ~ “Ebara Technologies, Inc.”, US subsidiary | ✓ Ebara Corp., Precision Machinery | Ebara Corporation [Source] |
| Headquarters | ✓ Tokyo | ✓ Tokyo | ✓ Tokyo | ✓ Tokyo | Ota-ku, Tokyo [Source] |
| Founded | ✓ 1912, Issei Hatakeyama | ✓ 1912, Issei Hatakeyama | ✓ 1912, Issei Hatakeyama | ✗ 1912, “Inokichi Hatakeyama” | 1912, Issei Hatakeyama [Source] |
| Series named | ✓ EV-S, ESA, AAS | ✓ EV-S, EV-M, PD | ~ EMT, EBT, EM | ✓ A series, EV series, ESR | EV, A and ESA/ESR dry pump families [Source] |
✓ correct · ~ partly right or outdated · ✗ wrong · ? cannot be checked against an official source. Answers condensed. Only Perplexity used web search; the other models answered from training data.
Largely consistent. The slips: Claude named the founder “Inokichi Hatakeyama” instead of Issei Hatakeyama, and Perplexity named Ebara’s US subsidiary as the owner rather than Ebara Corporation itself.
Search interest compared
Google Trends data compared with other Japanese and Korean semiconductor-vacuum brands, web search, October 2021 to October 2026. “ebara vacuum pump” barely registers. Fab engineers search by model and part number, and most searches for the Ebara name concern its water pumps.
Average search interest 2021–2026 (index)
Where people search for Ebara
How to read this: of every 100 Google searches for these five brand names in Singapore, 4 were for Ebara; the most searched brand there, ULVAC, had 64. It shows relative interest, not sales or market share.
| Country | Ebara share | Rank | Most searched |
|---|---|---|---|
| Singapore | 4 % | 4th of 5 | ULVAC (64 %) |
| South Korea | 1 % | 5th of 5 | ULVAC (69 %) |
Pulled on 9 October 2026 via DataForSEO. Terms compared: “ulvac”, “ebara vacuum pump”, “kashiyama pump”, “osaka vacuum”, “lot vacuum”. Relative values, not absolute search volumes; non-English searches are not included.
Technology fingerprint
Computed from our directory of 25 manufacturers: which technologies Ebara offers and how common each is in the market.
| Technology | Makers in our directory | |
|---|---|---|
| Turbomolecular | 7 of 25 | |
| Screw | 11 of 25 | |
| Roots | 11 of 25 |
Not in the range: Rotary vane, Claw, Liquid ring, Scroll, Diaphragm
Closest alternatives
Manufacturers with the largest overlap in pump technologies.
Product series at a glance
| Series | Technology | What it is for |
|---|---|---|
| EV series (EV-A, EV-S, EV-M) | Roots | Multi-stage dry pumps for semiconductor processes. |
| A series (e.g. A10S) | Roots | Multi-stage dry pumps, widely found refurbished. |
| Turbomolecular pumps | Turbomolecular | High-vacuum pumps for process tools. |
Typical fit
- Semiconductor etch and CVD processes
- Flat panel and solar production
- Process tools needing turbomolecular pumps
- Fab-wide dry pump fleets
Useful calculators
Official owner resources
Frequently asked questions
Who owns Ebara vacuum pumps?
They are made by Ebara Corporation, a listed Japanese group headquartered in Tokyo, through its precision machinery business, which also serves semiconductor fabs with other equipment.
Who founded Ebara?
Issei Hatakeyama founded Ebara in Tokyo in November 1912. The company began with pumps and today also makes compressors and turbines.
What are Ebara dry pumps used for?
Mainly as backing pumps in semiconductor and flat panel processes such as etch and CVD, where oil-free operation and resistance to process by-products matter.
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