Custom High-Tg PCB with High-Tg Laminate Options, Up to 64 Layers, and Lead-Free Reflow Compatibility

Custom High-Tg PCB

Huayihai fabricates custom high-Tg PCBs on high glass transition temperature laminates. A higher Tg raises the temperature at which the base material softens, which keeps the board dimensionally stable through lead-free reflow, thermal cycling, and elevated operating conditions.

High-Tg construction is typically specified for boards with many layers, thick stack-ups, heavy copper, or long service life in warm environments — builds where laminate expansion would otherwise stress plated holes and vias. Huayihai offers Hi-Tg laminates alongside FR-4, Rogers, halogen-free, and hybrid materials, built under IPC-A-600 workmanship standards.

Custom Manufacturing Only

We fabricate high-Tg PCBs according to customer Gerber files and technical specifications. We do not supply ready-made or standard stock boards.

Product Specifications

Key Features

• High-Tg laminate options for thermal stability

• Withstands lead-free reflow temperature profiles

• Reduced Z-axis expansion for reliable plated holes

• Suitable for high layer counts and thick boards

• Compatible with heavy copper up to 6 oz

• Manufactured under IPC-A-600 workmanship standards

Manufacturing Highlights

High-Tg material changes lamination and drilling behavior, so process parameters are adjusted to match the laminate. 

Key fabrication elements include:

• Material and stack-up review of Gerber files
• Lamination profiles matched to the laminate
• Drilling and plating controlled for reduced expansion
• Surface finishes rated for lead-free assembly
• 100% electrical testing before shipment

Typical Applications

High-Tg PCBs suit boards that face heat during assembly or in service:

• Automotive Electronics

• Industrial Power Equipment

• Communication Infrastructure

• Medical Device Electronics

• High-Layer-Count Boards

• Other High-Temperature Applications

Why Choose Huayihai

• Over 20 years of PCB manufacturing experience

• Hi-Tg laminates offered alongside FR-4, halogen-free, and hybrid materials

• Capability up to 64 layers, 6 oz copper, and 16:1 aspect ratio

• Quality management based on ISO 9001, ISO 13485, IATF 16949 and UL

• Thermal reliability testing available

• Prototype, low-volume, and mass production support

Manufacturing Process

• Gerber file, material, and stack-up review (2–5 working days engineering review)

• High-Tg laminate lamination

• Drilling and plating

• Outer layer imaging (3/3 mil)

• Solder mask and surface finish

• Thermal reliability testing, electrical testing, final inspection

FAQ

Q1: What does Tg mean?

Tg is the glass transition temperature — the point where the base material softens and expands more rapidly.

Q2: When should a high-Tg laminate be specified?

For lead-free reflow, high layer counts, thick boards, heavy copper, or long service life at elevated temperatures.

Q3: Is high-Tg compatible with heavy copper?

Yes, Hi-Tg builds support copper weights up to 6 oz.

Q4: What surface finishes suit high-Tg boards?

Lead-free HASL, ENIG, Im Sn, Im Ag, and OSP.

Q5: What is the standard lead time?

3–5 working days for PCB prototypes and batches, after file review is complete.

Q6: What Tg grades are available?

High-Tg laminate grades are available according to customer material requirements.

Q7: Can High-Tg PCBs be manufactured with ENIG?

Yes. ENIG, Lead-Free HASL, OSP, Immersion Tin, and Immersion Silver are available where specified.

Request a Quote

Need PCBs on high-Tg laminate for thermal reliability?

Send us your Gerber files and specifications for a quotation. Learn more at nexuspcba.com.