What Stellar Industries does

Stellar Industries Corp. is a privately held U.S. specialty manufacturer founded in 1985 and headquartered in Millbury, Massachusetts, operating as an independently managed subsidiary of the TRUMPF Group since its 2019 acquisition by TRUMPF Photonics. The company develops and produces ceramic materials and thermal management components for microelectronics and power electronics, and it self-identifies as the only U.S.-based manufacturer of Direct Bond Copper (DBC) substrates. Its core technology is a proprietary copper-oxygen eutectic bonding process conducted at 1065°C, which creates strong bonds between thick copper foil and ceramic substrates (Aluminum Oxide, Beryllium Oxide, or Aluminum Nitride), addressing CTE mismatch and delivering high thermal and electrical performance.

The company sells four integrated product lines: Direct Bond Copper substrates (the foundational offering, with proprietary pure copper thru-hole vias, integrated flying leads, and cryogenic reliability down to -196°C), Thin Film Metallization (E-beam vapor deposition with Angstrom-level precision and proprietary AuSn solder deposition), Micro-Channel Coolers (integrated DBC cold plates dissipating up to 15 W/mm² and all-copper coolers capable of 500W in a 40mm x 40mm area), and Precision Machined Ceramics (lapping, polishing, dicing, laser machining, and annealing). Manufacturing is conducted in a 38,000 sq ft ITAR-compliant facility with AS9100D and ISO 9001 certifications.

Stellar operates a build-to-print, low-to-medium volume manufacturing model with quote-based pricing and multi-year contracts, selling exclusively through direct enterprise field sales with engineering consultation. Its primary customer segments are Military and Aerospace (ITAR-controlled defense programs, satellite systems, extreme-environment components) and Telecommunications and Photonics (high-power laser diode cooling, AuSn submounts), with secondary exposure to Medical and Industrial Power Electronics and to Electric Vehicles (SiC and GaN power module packaging). The TRUMPF Group is both its parent and a major anchor customer, with over 1 million micro-channel cooler devices sold into TRUMPF systems.

Name

Stellar Industries

Legal name

Stellar Industries Corp.

Website

https://stellarind.com

Company type

Private

Founded year

1985

Operating status

Operating

Short description

Stellar Industries Corp. is a U.S.-based specialty manufacturer of ceramic substrates and thermal management components for power electronics, the only U.S. maker of Direct Bond Copper substrates, serving aerospace, defense, photonics, and industrial customers as a TRUMPF Group subsidiary.

Ownership category

akta.pro rank

Product category

Thermal Management and Power Semiconductor Packaging Components

NAICS

Semiconductor and Other Electronic Component Manufacturing (3344)

SIC

Electronic Components, Nec (3679)

akta.pro primary industry

AC-DC Power Supplies (Industrial PSUs, DIN-rail, enclosed/open-frame) (IMAGADAA)

Keywords

• Thermal management solutions
• Ceramic substrates manufacturing
• Power semiconductor packaging
• Direct bond copper
• Micro-channel coolers

Headquarters

HQ city

Millbury

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Supply Chain, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. DBC Substrates: Sale of Direct Bond Copper substrates - the core technology product. Custom, build-to-print manufacturing for low-to-medium volumes with pricing based on specifications and complexity.
2. Thin Film Metallization: High-purity thin film metallization services using E-beam vapor deposition. Custom patterning and AuSn solder deposition for precision applications.
3. Micro-Channel Coolers: Sale of high-performance micro-channel coolers including integrated DBC cold plates and all-copper coolers. Both isolated and non-isolated designs available for various power electronics applications.
4. Precision Machined Ceramics: Precision machining services including lapping, polishing, dicing, laser machining, and annealing for ceramic substrates.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Stellar Industries is a U.S.-based build-to-print manufacturer specializing in advanced thermal management and power semiconductor packaging components. The company manufactures Direct Bond Copper (DBC) substrates, thin film metallization, micro-channel coolers, and precision machined ceramics for high-power electronics. Its products are designed for low-to-medium volume custom production serving aerospace, defense, photonics, telecom, and industrial power electronics applications.

Product overview

Stellar Industries is a U.S.-based manufacturer specializing in advanced thermal management and power semiconductor packaging solutions, operating as a single integrated manufacturing company rather than a platform architecture. The company offers four core product lines: Direct Bond Copper (DBC) Substrates (the only U.S. manufacturer, bonding copper to ceramic for power electronics), Thin Film Metalization (E-beam vapor deposition for precision metallization), Micro-Channel Coolers (high-heat-flux cooling solutions with integrated DBC), and Precision Machined Ceramics (substrate preparation services). These products serve the aerospace, military, photonics, telecom, and industrial power electronics markets, with the company functioning as a build-to-print manufacturer focused on low-to-medium volume custom applications.

Differentiator

Problem solved

Functional benefit

Products and services

• Direct Bond Copper (DBC) Substrates Custom Direct Bond Copper substrates bonding thick copper foil directly to ceramic substrates (Alumina, Aluminum Nitride, Beryllium Oxide) using a proprietary eutectic process at 1065°C. Includes pure copper thru-hole vias, flying leaded substrates, fine-line thin copper metallization down to 3 mil, and cryogenic reliability tested to 1,000+ thermal cycles at -196°C. Built for low-to-medium volume custom production serving high-power-density power electronics, aerospace, military, and telecom customers.
• Thin Film Metallization High-purity E-beam vapor deposition thin film metallization service for fine-line, tight-tolerance custom circuitry on ceramic substrates. Uses chemical etching, ion beam etching, lift-off techniques, and shadow masking, plus proprietary vapor-deposited AuSn (Gold-Tin) eutectic solder with custom compositions (80/20, 70/30) for laser diode mounting. Designed for exacting precision applications in photonics, telecom, and aerospace.
• Micro-Channel Coolers High-performance micro-channel cooling solutions for extreme thermal challenges in laser and power electronics, including integrated DBC coolers (electrically isolated) and all-copper coolers (non-isolated). Proven to dissipate up to 15 W/mm² with isolated cold plates up to 125mm x 175mm and all-copper coolers as thin as 1mm. Sold both to TRUMPF (over 1 million devices) and external customers in laser, power electronics, and aerospace.
• Precision Machined Ceramics Material preparation and precision ceramic processing services including lapping (10-32 microinches Ra surface finish), polishing (1-4 microinches Ra), diamond dicing, laser machining, and annealing. Offers silicone and carbide-free processing options for demanding aerospace applications requiring absolute component reliability prior to metallization. Precision thickness control down to +/- 0.5 mil (0.0005 inch) is achievable.

Quantifiable outcome

• Efficiently dissipate 15 W/mm2 with integrated DBC cold plates
• +5 more outcomes

Named customers5 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature10 records

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• NGK Insulators: NGK produces ceramic substrates and power electronics packaging components, with comparable materials expertise in aluminum nitride and other high-thermal-conductivity ceramics used in DBC substrates.
• Kyocera Corporation: Kyocera is a large diversified ceramics and electronics manufacturer offering ceramic substrate packages and power module components, overlapping with Stellar in ceramic substrate and metallization for power electronics.
• CoorsTek Inc. CoorsTek is a global engineered ceramics manufacturer serving semiconductor, aerospace, and power electronics markets with ceramic substrates and precision components, comparable to Stellar's ceramic materials and machining capabilities.

Emerging players

• CPS Technologies Corporation: CPS Technologies manufactures metal-matrix composite and ceramic composite components for power electronics and thermal management, with adjacent offerings to Stellar's DBC and micro-channel cooler product lines.
• Advanced Thermal Solutions Inc. Advanced Thermal Solutions specializes in thermal management for power electronics, including cold plates, heat sinks, and liquid cooling solutions, overlapping with Stellar's micro-channel cooler and integrated DBC cold plate offerings.

Direct peers

• Maruwa Co., Ltd. Maruwa manufactures aluminum nitride and other ceramic substrates, including metallized substrates for power modules, overlapping directly with Stellar's AlN-based DBC substrate offerings.
• Denka Company Limited: Denka (formerly Showa Denko) is a major Japanese producer of DBC substrates and high-thermal-conductivity ceramic components for power electronics, comparable to Stellar in substrate materials and process technology.
• Rogers Corporation (Curamik): Rogers' Curamik division is a global leader in DBC and AMB ceramic substrates for IGBT, EV, and power module applications, directly competing with Stellar in power semiconductor packaging substrates.
• CeramTec GmbH: CeramTec produces advanced technical ceramics including aluminum nitride and alumina substrates used in power electronics packaging, comparable to Stellar's ceramic substrate and metallization business.
• Remtec Inc. Remtec is a US-based manufacturer of DBC (direct bond copper) and AMB ceramic substrates for power electronics and LED applications, making it the closest direct competitor to Stellar in North American ceramic-substrate thermal management.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@stellarindustriescorporati9490
• Facebookfacebook.com/StellarIndustriesCorporation
• LinkedInlinkedin.com/company/stellar-industries-corp.

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Stellar Industries