Corning SG 7.8 Semiconductor Glass

Original Manufacturer Reference · Corning · Semiconductor glass

Product Overview

Ultra-flat optical-grade semiconductor glass with a nominal CTE of 7.8 × 10⁻⁶/°C, available in wafer and panel formats.

Typical Applications

Semiconductor process carriers and packages
Optical and sensing structures
Applications requiring a higher-CTE glass substrate

Reference Specifications

The following values are condensed from the supplied manufacturer data sheet. Test conditions are retained where they affect interpretation.

Wafer capability	100–300 mm diameter; 0.4–2.0 mm thick; TTV ≤10 µm; warp ≤100 µm
Panel capability	0.4–1.2 mm; up to 600 × 600 mm; TTV ≤15 µm; warp ≤500 µm
Density	2.39 g/cm³
Young’s / shear modulus	69.3 / 28.5 GPa
Poisson’s ratio	0.22
Vickers hardness / fracture toughness	534 kgf/mm² / 0.66 MPa·m½
CTE	7.8 × 10⁻⁶/°C
Refractive index / Abbe number	1.50 / 61.7

China-Made Alternative Products

A China-made candidate is matched to the 7.8-class expansion range, modulus, thickness, flatness and optical/electrical requirements, followed by thermal-cycle and downstream process trials.

Recommended matching criteria:

Higher-CTE Chinese specialty glass
Wafer or panel dimensional customization
Process-specific thermal matching

Target modelCritical parametersCandidate gradeSample testingBatch qualification

Customization and Processing

Round wafers, square panels, windows and custom outlines
Precision cutting, edge grinding, chamfering and laser processing
Single- or double-side polishing, thinning, cleaning and marking
TTV, warp, roughness, dimensional and optical inspection to agreed criteria

Qualification Note

Important: “Alternative” means a candidate selected for the same application target. It does not mean an automatic drop-in replacement or identical composition. Final acceptance is based on agreed specifications, samples, test reports and process verification.

Request Material Matching

Manufacturer and product names are used only to identify reference materials and technical targets. Semicon Global Tech is an independent supplier and does not claim manufacturer authorization unless explicitly stated. Original-grade data and China-made alternative specifications are presented separately; supply specifications are confirmed by quotation, COA and approved samples.

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