The United States is not the world’s largest PCB-producing region. However, when a project involves aerospace, defense, medical, industrial control, high-end computing, or other high-reliability electronics, U.S.-based PCB manufacturers still occupy a distinctive position in the supply chain.
High-Tg PCB manufacturing is a good example.
Many buyers searching for high-Tg PCB manufacturers in the USA are not simply looking for a Tg 170 or Tg 180 FR-4 board. They may also require domestic fabrication, a rigorous quality system, complex multilayer or HDI capability, materials-engineering support, or project-specific conditions such as ITAR registration, AS9100 certification, or MIL-spec qualification.
As a result, the supplier landscape for high-Tg PCBs in the United States differs from that in Asia.
Some U.S. manufacturers operate multiple PCB fabrication sites and materials laboratories. Others have a single domestic plant but specialize in quick-turn, aerospace, defense, or high-reliability prototypes. Still others compete less on capacity than on their ability to process specialty laminates, RF materials, rigid-flex constructions, and complex mixed-material stack-ups.
The manufacturers below are not ranked by revenue or output. Instead, this comparison focuses on three practical questions:
Does the company have genuine PCB fabrication capability in the United States? Is there public evidence that it processes high-Tg or high-temperature laminates? What differentiates it from other U.S. PCB manufacturers?
1. TTM Technologies
TTM Technologies is difficult to overlook in any discussion of advanced PCB manufacturing in the United States.
TTM is a global manufacturer, and not every PCB it supplies is produced in the United States. However, it has a substantial U.S. footprint in PCB fabrication and advanced electronics manufacturing. That distinguishes it from suppliers that are headquartered in the United States but manufacture primarily in Asia.
- Established: Incorporated in 1998.
- Global headquarters: Santa Ana, California.
- Website: TTM Technologies
- U.S. manufacturing footprint: PCB and advanced-technology facilities in states including Wisconsin, Oregon, Utah, California, Virginia, and New York. Current U.S. locations include Chippewa Falls, Forest Grove, Logan, San Diego, San Jose, Santa Ana, Sterling, and Syracuse.
- Primary markets: Aerospace and defense, data-center computing, networking, automotive, medical, and industrial.
- Key PCB technologies: High-layer-count PCBs, HDI and ultra-HDI, multiple lamination cycles, RF and microwave boards, mixed dielectrics, backdrilling, and advanced signal-integrity support.
TTM’s high-Tg capability is not presented through a single dedicated “High Tg PCB” marketing page.
Instead, its conventional PCB capabilities list high-temperature laminates among the available material categories. TTM’s RF materials documentation also references 370HR and covers mixed dielectrics, sequential lamination, microvias, and a broad range of RF materials.
This type of manufacturing platform is better suited to complex projects.
A conventional six-layer Tg 170 PCB may not require a supplier of TTM’s scale. But when a board also involves a high layer count, advanced HDI, mixed materials, backdrilling, or mission-critical reliability, laminate Tg becomes only one part of the manufacturing challenge.
Another point to note is that TTM’s U.S. facilities do not all have the same technical focus.
For example, Forest Grove emphasizes advanced HDI, high-layer-count boards, advanced materials, and multiple sequential lamination, while Logan is oriented more toward high-mix, low-volume production.
When requesting a quote from TTM, the relevant question is therefore not only whether TTM can build the board, but also which fabrication site would handle it.
2. Sanmina
Sanmina and TTM are both large U.S.-based electronics manufacturers, but their manufacturing models are not identical.
One of Sanmina’s defining strengths is its ability to connect PCB fabrication with a broader NPI, system-manufacturing, and global electronics-manufacturing platform.
- Established: 1980.
- Headquarters: San Jose, California.
- Website: Sanmina
- U.S. PCB manufacturing sites: San Jose and Costa Mesa, California. San Jose focuses on advanced PCBs and backplanes, while Costa Mesa supports complex rigid, rigid-flex, HDI, and high-reliability products.
- Primary markets: Communications, cloud and computing, medical, defense and aerospace, industrial, and automotive.
- Company background: Sanmina began in Silicon Valley and has grown into a major global contract manufacturer with a broad international manufacturing network.
Sanmina’s public evidence for high-Tg capability is relatively direct.
Its published capabilities include:
More than 70 layers, specialty and high-speed laminates, multiple sequential lamination, mechanical and laser microvias, and high-speed, high-temperature FR materials.
Sanmina also operates materials qualification laboratories that use methods such as TGA, TMA, and SIR testing to support laminate qualification and process development.
That represents a different level of material control from simply purchasing Tg 170 laminate and processing it through a conventional fabrication flow.
For data-center, communications, high-layer-count backplane, and other complex high-reliability programs, Sanmina’s value extends well beyond high-Tg materials.
Its PCB platform includes any-layer HDI, aspect ratios up to 35:1, more than 70 layers, backdrilling, heavy copper, and advanced signal-integrity analysis.
If a program will later require PCBA, system build, or transfer to a global manufacturing network, Sanmina’s vertical integration becomes even more relevant.
3. AdvancedPCB
AdvancedPCB is one company on this list whose name can be misleading: the AdvancedPCB brand is new, but its U.S. PCB manufacturing history is not.
The current AdvancedPCB organization brings together APCT, Advanced Circuits, and San Diego PCB Design under one brand.
- Manufacturing history: Traces back to Advanced Printed Circuit Technology (APCT), founded in 1977.
- AdvancedPCB brand launched: 2024.
- Headquarters: Aurora, Colorado.
- Website: AdvancedPCB
- U.S. footprint: Multiple PCB manufacturing and engineering locations in Colorado, California, Arizona, and Minnesota. The company states that it operates six U.S. facilities.
- Primary PCB products: Rigid, HDI, flex, rigid-flex, RF and microwave, heavy-copper, and advanced multilayer PCBs.
For buyers who want publicly available evidence of high-Tg material capability, AdvancedPCB is easier to verify than some larger manufacturers.
Its laminate database lists:
- Isola 370HR, Tg 180 degrees C
- Isola 185HR, Tg 180 degrees C
- FR406, Tg 170 degrees C.
The company also discusses high-Tg and low-CTE materials, HDI and microvia compatibility, sequential lamination, and thermal-stress performance as part of laminate engineering.
Its U.S. HDI fabrication capabilities include laser-drilled microvias, stacked microvias, blind and buried vias, via-in-pad, sequential lamination, and controlled impedance.
AdvancedPCB is notable for combining a quick-turn and prototype heritage with a broader domestic PCB manufacturing network built through multiple acquisitions.
It is therefore neither a pure high-volume manufacturing group nor a small quick-turn shop with only a prototype line.
For engineering teams that need U.S.-based manufacturing, high-Tg materials, and prototype or advanced multilayer capability, this structure can be attractive.
4. Sierra Circuits
Sierra Circuits follows a different model from the companies above.
It has long been rooted in Silicon Valley and clearly positions itself around engineering-intensive prototypes and advanced PCB technology.
- Established: 1986.
- Headquarters and primary manufacturing site: Sunnyvale, California.
- Website: Sierra Circuits
- U.S. facility: 1108 West Evelyn Avenue, Sunnyvale, California. Company materials describe a campus of approximately 70,000 square feet.
- Primary focus: Quick-turn PCBs, advanced multilayer boards, HDI, flex and rigid-flex, controlled impedance, aerospace and defense, and medical PCBs.
- Production profile: Standard rigid PCBs up to 30 layers, with domestic fabrication and assembly.
Sierra’s high-Tg material information is especially useful to engineers because it identifies specific laminates and their Tg values.
Examples include:
- Isola 370HR – 180 degrees C
- I-Speed – 180 degrees C
- I-Tera MT40 – 200 degrees C
- Tachyon-100G – 192 degrees C
- Nelco N4000-13SI – 210 degrees C
as well as other specialty laminates.
One detail deserves attention.
Sierra’s educational material uses a relatively strict definition of high Tg, generally emphasizing materials at or above 180 degrees C. In the wider PCB market, however, materials around Tg 170 are also commonly described as high-Tg FR-4. For a broader explanation of these categories, see the FR-4 PCB Material Guide.
This does not change Sierra’s manufacturing capability. It does remind engineers that suppliers do not always use the term “high Tg” in exactly the same way; the specific laminate grade is usually more meaningful than the category label.
Sierra’s strengths are oriented more toward design support, stack-up development, quick-turn builds, and complex prototypes than toward a global volume-production platform.
For programs still in design validation and requiring frequent communication with CAM and engineering teams, this Silicon Valley prototype model differs significantly from the large-scale manufacturing models of Sanmina and TTM.
5. Calumet Electronics
For buyers who specifically prioritize genuine domestic PCB manufacturing, Calumet Electronics deserves separate consideration.
The company does not operate an offshore manufacturing network. Instead, it has made “100% domestic PCB manufacturing” a central part of its positioning.
- Established: 1968.
- Headquarters and manufacturing site: Calumet, Michigan.
- Website: Calumet Electronics
- Manufacturing model: The company states that it is 100% American-owned and operated, with PCB design, engineering, and manufacturing completed in the United States rather than offshored or brokered.
- Manufacturing scale: Approximately 160,000 square feet of U.S. PCB manufacturing space.
- Primary markets: Aerospace, defense, communications, electric power, medical, industrial controls, space, and national security.
Calumet is also transparent about its material capabilities.
Its current capabilities roadmap lists:
- FR-4 Tg 140
- FR-4 Tg 170
- FR408HR
- I-Tera
- Megtron 6
- Megtron 7
- Tachyon
- Astra
as well as polyimide, Rogers, and other advanced materials.
Its standard layer-count capability reaches 40 layers, its advanced capability exceeds 40 layers, and its roadmap identifies 54-plus layers as an emerging capability.
For HDI, Calumet supports sequential lamination, blind vias, laser microvias, backdrilling, and advanced build-up structures.
Calumet also stands apart in its compliance environment.
The company currently lists HUBZone, IPC-1791, NADCAP Merit, AS9100D, ISO 9001, MIL-PRF-31032 and MIL-PRF-55110, ITAR, and UL credentials or registrations.
For defense, aerospace, or other programs whose supply chain must remain in the United States, this manufacturing model is clearly different from that of a conventional commercial PCB supplier.
6. American Standard Circuits
American Standard Circuits, commonly abbreviated as ASC, is another representative U.S. specialty PCB manufacturer.
Its capabilities in advanced materials, RF, thermal management, and specialized PCB constructions are more distinctive than its high-Tg FR-4 offering alone.
- Established: 1988.
- Headquarters and primary manufacturing site: West Chicago, Illinois.
- Website: American Standard Circuits
- Company development: ASC formed a strategic combination with Sunstone Circuits in 2023 and has continued to integrate its brands and U.S. PCB manufacturing resources.
- Primary products: Ultra-HDI, rigid, metal-backed and metal-core, RF and microwave, flex, and rigid-flex PCBs.
- Primary markets: Military, aerospace, industrial, medical, telecom, computing, radar, and transportation.
ASC’s public high-Tg evidence is notable because it extends beyond conventional FR-4.
For example, ASC manufactured multilayer test panels used in IST thermal-cycling validation of Aismalibar’s 180 degrees C high-Tg, 3.2 W/m-K thermally conductive multilayer material.
ASC has also obtained UL qualification for Panasonic MEGTRON 4 and MEGTRON 6. MEGTRON 4 is positioned as a low-Dk, high-Tg material for applications such as servers, network equipment, and measurement systems.
ASC can therefore be viewed as a manufacturer focused on:
High Tg + thermal management + RF and specialty materials
rather than simply as a conventional Tg 170 multilayer supplier.
Its current quality credentials include AS9100 Rev D, ISO 9001:2015, MIL-PRF-31032, MIL-PRF-55110, and MIL-PRF-50884.
ASC’s technical direction is especially relevant for projects that require metal-backed PCBs, RF and microwave construction, thermally conductive laminates, or hybrid materials.
7. Cirexx International
Cirexx is another PCB company on this list with a distinctly Silicon Valley profile.
It operates a concentrated U.S. manufacturing organization and has long focused on quick-turn, complex PCB, and high-reliability markets.
- Established: 1980.
- Headquarters and manufacturing site: Santa Clara, California.
- Website: Cirexx International
- Manufacturing model: The company states that PCB layout, fabrication, assembly, testing, and validation are completed in the United States and describes its model as 100% U.S. manufacturing.
- Primary PCB types: Rigid, HDI, flex, rigid-flex, RF and microwave, hybrid, and specialty-material PCBs.
- Primary markets: Defense, aerospace, medical, industrial, automotive, and electronics for demanding environments.
Cirexx’s public description of its high-Tg capability is direct.
The company states that it routinely processes a range of high-Tg materials. Its rigid high-Tg capability covers 1 to 30 layers, vacuum lamination, sequential lamination, blind and buried vias, stacked vias, and controlled impedance.
This indicates that Cirexx’s high-Tg capability is not limited to simple multilayer FR-4 boards.
It also supports RF and high-speed materials, mixed FR-4 and PTFE constructions, heavy copper, and other specialty structures.
Cirexx currently lists AS9100, MIL-PRF-31032, MIL-P-55110, MIL-P-50884, IPC-6012, IPC-6013, IPC-6018, ITAR, and UL among its certifications, qualifications, and registrations.
Cirexx is clearly smaller than TTM or Sanmina.
For high-reliability quick-turn builds, complex prototypes, rigid-flex, or mixed RF and high-Tg technology, however, that smaller scale represents a different and potentially useful manufacturing model.
How Does the U.S. High-Tg PCB Market Differ from the Asian Market?
These manufacturers reveal a clear characteristic of the U.S. market:
High Tg is rarely the only technology on which a supplier competes.
Many U.S. manufacturers position high-Tg processing within a broader high-reliability manufacturing system.
TTM and Sanmina emphasize advanced materials, high-layer-count PCBs, HDI, signal integrity, and mission-critical production.
Calumet places strong emphasis on domestic manufacturing, the U.S. defense supply chain, and high-reliability PCBs.
Sierra and Cirexx highlight Silicon Valley-style quick-turn, prototype, and advanced engineering support.
ASC is differentiated more by its RF, thermal-management, metal-backed, and specialty-material capabilities.
If the only requirement is the lowest-priced four-layer Tg 170 PCB, U.S. manufacturers are usually not the most typical choice in the global market.
Their value becomes more apparent when the purchasing requirements include:
- U.S. fabrication required
- ITAR or defense program
- High-reliability Class 3
- Complex HDI
- Specialty laminate
- Quick-turn engineering build
Under those conditions, U.S. manufacturers can offer a clear advantage.
A “U.S. PCB Manufacturer” Does Not Necessarily Produce Every Board in the United States
This distinction is easy to miss during supplier qualification.
TTM and Sanmina are U.S. companies with genuine domestic PCB fabrication facilities, but they also operate global manufacturing networks.
If a project specifically requires:
Made in USA
or:
U.S. fabrication only
the manufacturing location should be stated explicitly in the RFQ and purchasing documents.
By comparison, Calumet and Cirexx use more direct public language, explicitly emphasizing domestic PCB fabrication.
This is not a question of which model is inherently better; the correct choice depends on the purchasing conditions.
For a conventional industrial PCB, global manufacturing flexibility may be an advantage. For certain defense, security, or IP-sensitive programs, the fabrication location itself is part of the specification.
Specify the Exact Laminate, Not Just “High Tg”
The public capabilities of these manufacturers reinforce an important point:
“High Tg” is not a material name.
A single manufacturer may process:
370HR, FR408HR, I-Speed, Megtron, Nelco, Rogers, and many other laminate systems.
Some are conventional high-Tg FR-4 systems, while others are also designed for low-loss, high-speed, RF, or specialized thermal requirements.
Therefore, specifying:
> High-Tg FR-4
is not the same fabrication requirement as specifying:
> Isola 370HR
even though both may fall under the same broad category.
If a project also includes controlled impedance, multiple lamination cycles, or high-speed signals, the production laminate’s Dk, Df, CTE, and available core and prepreg thicknesses become even more important. Review SAYFU’s rigid PCB manufacturing capabilities when defining manufacturability requirements before requesting a quote.
Which Projects Are Most Likely to Use a U.S. High-Tg PCB Manufacturer?
Domestic U.S. production usually costs more than large-scale Asian PCB manufacturing, so buyers should first clarify why U.S. fabrication is required. For comparison with Asian sourcing models, see the guide to High Tg PCB manufacturers in China.
U.S. manufacturers are more likely to make the shortlist for:
- Aerospace and defense electronics
- ITAR-controlled programs
- Medical and high-reliability industrial PCBs
- Quick-turn engineering prototypes
- Complex HDI and high-layer-count boards
- RF, microwave, or mixed-material PCBs
- Intellectual-property-sensitive projects
- NPI programs that require U.S.-based engineering communication and fabrication
The sourcing logic may be completely different for a mature, high-volume commodity multilayer design.
FAQ
Are There U.S. Factories That Actually Manufacture High-Tg PCBs?
Yes.
TTM, Sanmina, AdvancedPCB, Sierra Circuits, Calumet Electronics, American Standard Circuits, and Cirexx all operate PCB manufacturing facilities in the United States and publish evidence of high-Tg, high-temperature, or related advanced-laminate capability.
Can U.S. PCB Manufacturers Process Isola 370HR?
Yes. Several U.S. manufacturers publicly identify 370HR as an available material.
TTM’s materials documentation references 370HR, AdvancedPCB’s laminate database lists 370HR at Tg 180 degrees C, and Sierra Circuits includes FR370HR in its high-Tg material list.
Specific core and prepreg thicknesses, certifications, and material availability should still be confirmed for each project.
Is Every U.S. High-Tg PCB Manufacturer Suitable for Defense Programs?
No.
The ability to process a high-Tg laminate does not mean that every manufacturing site meets the same defense, ITAR, or MIL-spec requirements.
Qualification should be based on the certifications, registrations, approved processes, and scope of the specific factory that will build the board.
Are High-Tg PCBs Made in the United States More Expensive Than Boards Made in China?
Domestic U.S. manufacturing often costs more, but price cannot be compared by country alone.
Layer count, laminate grade, board thickness, HDI structure, testing, quantity, certification requirements, and lead time can all have a major effect on price.
The value of U.S. manufacturing is usually tied to domestic supply-chain requirements, quick-turn engineering, high-reliability programs, IP protection, or specific compliance obligations rather than the lowest possible unit price.
Final Thoughts
If the only screening criterion is the ability to supply Tg 170 or Tg 180 FR-4, the United States offers many options.
The seven manufacturers in this article, however, are differentiated at several different levels.
TTM and Sanmina represent large advanced-PCB manufacturing platforms. AdvancedPCB strikes a different balance among multiple U.S. facilities, quick-turn service, and advanced multilayer capability. Sierra Circuits is more focused on Silicon Valley-style engineering prototypes. Calumet emphasizes fully domestic high-reliability manufacturing. ASC extends into thermal, RF, and specialty materials. Cirexx concentrates high-reliability quick-turn, rigid-flex, and complex PCB capabilities within a U.S. manufacturing operation.
When searching for high-Tg PCB manufacturers in the USA, a more important question than company size may be:
Is the manufacturer’s specific U.S. facility genuinely suited to your laminate, PCB complexity, volume, and compliance requirements?
For high-Tg PCBs, that question is usually more useful than comparing Tg 170 and Tg 180 in isolation.
If you need a high-Tg PCB supplier for aerospace, defense, medical, industrial, or high-speed applications, SAYFU can review your layer count, laminate grade, impedance requirements, lead time, and certification needs before fabrication. Submit your Gerber files or project specifications for a technical review and project-specific quotation.