ISOLA 370HR High TG PCB

High-performance 180°C Tg FR-4 for multilayer PWB where maximum thermal performance and reliability are required.

About ISOLA 370HR

ISOLA 370HR is a high performance 180°C glass transition temperature (Tg) FR-4 system for multilayer Printed Wiring Board (PWB) applications where maximum thermal performance and reliability are required.

ISOLA 370HR laminate and prepreg products are manufactured with a unique high performance multifunctional epoxy resin, reinforced with electrical grade (E-glass) glass fabric.

This system provides improved thermal performance, and low expansion rates in comparison to traditional FR-4 while retaining FR-4 processability. In addition to this superior thermal performance, the mechanical, chemical and moisture resistance properties all equal or exceed the performance of traditional FR-4 materials.

Key Specifications

Key Specifications — ISOLA 370HR (per source page “Key feature” list)

Parameter	ISOLA 370HR
Glass Transition Temp (Tg, DSC)	180 °C
Thermal Decomposition Temp (Td, TGA @ 5% wt loss)	340 °C
Time to Delamination (T260)	60 minutes
Time to Delamination (T288)	30 minutes
Coefficient of Thermal Expansion (CTE)	Low CTE for reliability
Thickness range	0.002″ (0.05 mm) to 0.125″ (3.2 mm)
Flammability / environmental	RoHS Compliant
Laminate & prepreg standard	IPC-4101D WAM1 /98 /99 /101 /126
UL recognition	File Number E41625 as PCL-FR-370HR

Why ISOLA 370HR High TG PCB

Features of ISOLA 370HR High TG PCB

High Tg 180°C

Glass transition temperature 180°C (DSC) — well above standard FR-4 for lead-free reliability.

High Td 340°C

Thermal decomposition 340°C (TGA @ 5% wt loss) — resists high-temperature assembly.

Low CTE

Low coefficient of thermal expansion for through-hole and via reliability.

T260 / T288 resistance

T260: 60 minutes · T288: 30 minutes — resists delamination under heat.

RoHS & IPC-4101D

RoHS Compliant; qualified to IPC-4101D WAM1 /98 /99 /101 /126.

Best-in-class HDI

Proven best in class for sequential lamination (HDI) designs.

ISOLA 370HR PCB Examples

Andwin builds ISOLA 370HR multilayer boards using this high-Tg, FR-4-process-compatible material for high-reliability applications.

Multilayer HDI Build

Sequential lamination example.

High-Reliability PCB

Source-page product photo.

Thermal-Performance PCB

Source-page product photo.

Raw Material & Supplier

ISOLA

ISOLA 370HR is a high-performance 180°C Tg FR-4 system (multifunctional epoxy + E-glass) for multilayer PWB requiring maximum thermal performance and reliability. Andwin fabricates ISOLA 370HR boards as a professional PCB manufacturer (since 2003).

Andwin Circuits

Why Choose Us?

✓ Since 2003

Professional PCB manufacturer with two decades of build experience.

✓ ISO 9001

ISO 9001 certified quality management.

✓ IATF 16949

Automotive-grade process certification.

✓ UL recognized

UL File Number E41625 (PCL-FR-370HR).

✓ RoHS compliant

ISOLA 370HR material is RoHS Compliant.

✓ High-Tg expertise

Deep experience in high-Tg FR-4 and HDI sequential lamination.

ISOLA 370HR vs Standard FR-4

ISOLA 370HR (ISOLA) vs Standard FR-4

Property	ISOLA 370HR	Standard FR-4
Laminate type	High-Tg FR-4 (multifunctional epoxy + E-glass)	Standard FR-4 *
Glass transition (Tg)	180 °C	~130 – 140 °C *
Thermal decomposition (Td)	340 °C	~310 – 340 °C *
Thermal performance	Improved vs traditional FR-4 (per page)	Baseline *
Processability	FR-4 process compatible	FR-4 process
RoHS	Compliant	Varies *
Best use	High-reliability multilayer PWB, HDI sequential lamination	General-purpose digital & power *

Frequently Asked Questions

1. What is ISOLA 370HR?

ISOLA 370HR is a high-performance 180°C glass transition temperature (Tg) FR-4 system built with a multifunctional epoxy resin reinforced with E-glass fabric. It targets multilayer PWB where maximum thermal performance and reliability are required, while staying compatible with standard FR-4 processing.

2. Is ISOLA 370HR RoHS compliant and which standards does it meet?

Yes. ISOLA 370HR is RoHS compliant and qualified to IPC-4101D WAM1 / 98 / 99 / 101 / 126, with UL recognition under File Number E41625 (PCL-FR-370HR).

3. Can ISOLA 370HR be used for HDI and sequential lamination?

Yes. Per the source material description, ISOLA 370HR is proven best in class for sequential lamination (HDI) designs, and its laser-fluorescing / UV-blocking finish is compatible with AOI and optical positioning systems.

4. How does ISOLA 370HR compare with standard FR-4?

It offers a higher Tg (180°C vs ~130–140°C for standard FR-4), higher Td (340°C), low CTE and better thermal reliability, while retaining FR-4 processability. See the comparison table above for a side-by-side view.

5. What files should I send to get an ISOLA 370HR PCB quote?

Send your Gerber files (RS-274X / ODB++) and BOM, plus stack-up requirements (layer count, finished thickness, surface finish, impedance if needed). Andwin provides a free DRC / DFM review before production.

6. What are the lead time and minimum order quantity (MOQ)?

Lead time and MOQ depend on your stack-up, layer count and order volume. Please confirm the exact figures with our sales team when you send the inquiry, so we quote against your real project rather than a generic number.