4-inch SGGG Large-Size Substrate, Gadolinium Gallium Garnet Single Crystal, (111) EPI-Grade Polished, Faraday Rotator for 1.6T/CPO Optical Modules, High-Capacity Magneto-Optical Film Epitaxy
Price:
Negotiable
MOQ:
Negotiable
Delivery Time:
Negotiable
Brand:
Crystro
Product Description
4-inch SGGG Large-Size Substrate, Gadolinium Gallium Garnet Single Crystal, (111) EPI-Grade Polished, Faraday Rotator for 1.6T/CPO Optical Modules, High-Capacity Magneto-Optical Film Epitaxy
The 4-inch SGGG large-size substrate is a high-end specification for next-generation high-speed optical communications (1.6T/CPO) and large-scale production lines. With a diameter of 101.6 mm and standard thickness of 800 ± 30 μm (or custom), it is based on large-size single crystal growth technology. Full-wafer lattice constant uniformity ≤ 0.003 Å, dislocation density ≤ 10 cm⁻², and effective area ≥ 80%. Rotator chip output per wafer increases approximately 75% compared to 3-inch, significantly reducing per-chip cost.
Large-size SGGG crystal growth is technically demanding, requiring strict thermal field control, raw material purity, and annealing processes. Through optimized Czochralski growth and multi-step annealing, this product achieves low-stress, low-absorption, high-uniformity crystal quality. Combined with primary/secondary flats and EPI-grade super-smooth polishing, it meets the large-size mass production requirements of high-end magneto-optical film epitaxy equipment.
Key Functions
High-capacity substrate for 1.6T/CPO era:
4-inch large size adapts to next-gen high-speed module rotator mass production, more chips per wafer
Lower per-chip cost:
~75% larger effective area than 3-inch, dilutes epitaxy, dicing, and inspection costs
High-end magneto-optical film epitaxy:
High lattice uniformity ensures large-area BIG film thickness and magneto-optical performance consistency
Core material for domestic substitution:
Breaks overseas monopoly on large-size SGGG substrates, supports domestic optical module supply chain independence
Similar Products
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
ANHUI CRYSTRO CRYSTAL MATERIALS Co., Ltd.
Location
No. 176, Yuner Rd, Yunhai Rd Industrial Park, Baohe District，Hefei City，Anhui Province
Contact Person
Wu