Portrait of Timothy Grotjohn
Photo: National Academy of Inventors / credited photographer not identified in bookSource · NAI informational/editorial image; no open licence asserted
Industrial & Manufacturing

Timothy Grotjohn

Single-crystal CVD diamond substrates

United StatesEvidence: high confidenceChecked July 2026

Extract only the official-book portrait on PDF page 17 at bbox [72, 36, 135.9, 126] after editorial rights review; copyright and other rights remain with NAI and any photographer.

Who is Timothy Grotjohn?

Timothy Grotjohn is an inventor associated with United States. Their documented work in industrial & manufacturing includes Single-crystal CVD diamond substrates, the contribution at the center of this evidence-backed profile.

This record is limited to Plasma chemical-vapor-deposition systems. It is retained only as a physical technology/process rather than a field-only biography.

Known forSingle-crystal CVD diamond substrates
FieldIndustrial & Manufacturing
Associated withUnited States
Evidence reviewed3 sources
01

What did Timothy Grotjohn invent?

NAI 2023 Fellow; product boundary independently constrained for this physical-technology screen.

02

What did Timothy Grotjohn accomplish?

MSU identifies Grotjohn-led diamond growth, reactor, and device research as the technical foundation for Great Lakes Crystal Technologies, an active startup commercializing semiconductor-grade diamond materials; the company identifies him as co-founder and CTO.

03

What is known about Timothy Grotjohn today?

The official 2023 NAI Fellows Book, published May 2024, names Timothy Grotjohn as a Fellow; NAI rules state that deceased nominees are ineligible. The linked institutional profile is preserved for current identity verification.