High-Tg Low-CTE FR-4

Shengyi S1000-2 PCB Fabrication

High-Tg (180C) FR-4 with low Z-axis CTE (2.8%) for lead-free multilayer builds up to 30+ layers in automotive, server, and telecom

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Shengyi S1000-2 high-Tg multilayer FR-4 PCB with plated through-holes for high-layer-count builds

180C

Tg (DSC)

355C

Td

4.4

Dk @ 1 GHz

2.4%

CTE 50-260C

Key Features

  • High-Tg 180C (DSC) / 185C (DMA) for superior thermal reliability
  • Low Z-axis CTE (2.4% at 50-260C) for PTH via reliability in high-layer boards
  • T260 >60 min, T300 >15 min handles aggressive reflow profiles
  • UV blocking / AOI compatible
  • IPC-4101/126 compliant, widely qualified across automotive and telecom OEMs

Applications

Shengyi S1000-2 is proven in production for: automotive ECUs, server motherboards, telecom base station cards, networking switches, high-layer-count backplanes (20-40 layers), industrial controllers.

How It Compares

S1000-2 is Shengyi's go-to high-Tg FR-4 for demanding multilayer applications. Compared to S1150G (Tg 150C), it offers 30C higher Tg and significantly better Z-axis CTE control. Against Isola 370HR (Tg 180C, Td 340C), S1000-2 matches the Tg and exceeds Td (355C vs 340C) at a 20-30% cost advantage.

Design Parameters

PropertyValue
Glass Transition (Tg)180C
Decomposition Temperature (Td)345C
T260>60 min
T28820 min
CTE Z-axis (before Tg)45 ppm/C
CTE Z-axis (after Tg)220 ppm/C
CTE Z-axis (50-260C)2.8%
Dk4.4
Df0.015
Peel Strength (after 288C)1.3 N/mm
FlammabilityUL 94 V-0
IPC SpecificationIPC-4101/126

Shengyi S1000-2 In Production

Genuine high-Tg S1000-2 multilayer boards we fabricate, and the thermally demanding systems they go into.

Shengyi S1000-2 high-Tg multilayer FR-4 PCB with dense routing for high-layer-count builds
Multilayer board

High-layer-count multilayer on S1000-2 — Tg 180C holds registration through 20-40 layer lamination.

Plated through-hole cross-section showing barrel reliability in low-CTE S1000-2 laminate
Cross-section

Plated through-hole barrel: S1000-2 low Z-axis CTE (2.4% at 50-260C) protects PTH walls in lead-free reflow.

Server motherboard, a primary application for high-Tg high-Td Shengyi S1000-2 laminate
Server / telecom

Server and telecom boards: S1000-2 Td 355C and T260 >60 min survive repeated high-temperature assembly.

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