200 mm HPSI SiC Substrate Wafer Manufacturer

200 mm 4H High-Purity Semi-Insulating Silicon Carbide Substrates

HMT supplies 200 mm (8-inch) high-purity semi-insulating (HPSI) 4H-SiC substrate wafers for semiconductor applications requiring an electrically resistive substrate platform. With a nominal wafer diameter of 200 mm and a standard thickness of 500 ± 25 μm, these substrates are available in D Grade and P Grade configurations.

The electrical resistivity of an HPSI substrate is a key material characteristic, particularly when the wafer is used as a foundation for high-frequency device structures. In addition to resistivity, wafer geometry, crystal quality and surface condition are important factors when evaluating substrate compatibility with epitaxial growth and subsequent device fabrication. HMT's 200 mm HPSI SiC offering is intended for customers developing or manufacturing devices on large-diameter semi-insulating silicon carbide substrates.

Why Choose a Semi-Insulating 4H-SiC Substrate?

The electrical behavior of a substrate can influence the design and operation of semiconductor structures built above it. In high-frequency device applications, a semi-insulating substrate is selected to provide a highly resistive material foundation and help limit unwanted electrical conduction through the substrate.

HPSI 4H-SiC combines the material characteristics of silicon carbide with a high-resistivity electrical profile. This makes it a relevant substrate option for device platforms where substrate-related electrical losses and isolation are important design considerations.

200 mm HPSI 4H-SiC Wafer Specifications

The product combines a 4H-SiC crystal structure with semi-insulating electrical characteristics. D Grade and P Grade are available within the HPSI product range, allowing customers to select a substrate configuration according to their technical and manufacturing requirements.

High Electrical Resistivity for RF Device Platforms

Electrical resistivity is one of the primary parameters used to characterize an HPSI SiC wafer. A highly resistive substrate can help reduce parasitic conduction through the substrate and support electrical isolation in suitable device structures.

For RF semiconductor development, substrate resistivity is therefore considered alongside the epitaxial structure, device layout, operating frequency and fabrication process. The actual RF performance of a finished device depends on the complete device architecture and cannot be determined by substrate resistivity alone.

4H-SiC Material Platform

The 4H polytype is widely used in semiconductor applications because of its relevant electrical and physical material properties. In an HPSI substrate, the 4H-SiC crystal structure is combined with semi-insulating electrical characteristics to provide a material platform for suitable epitaxial and device processes.

Customers selecting a 4H HPSI wafer should evaluate the crystal specification, resistivity range, surface condition and geometry together rather than treating the polytype as the only selection criterion.

200 mm Wafer Diameter for Large-Area Semiconductor Manufacturing

Moving to a 200 mm wafer platform involves more than increasing the substrate diameter. Wafer dimensions, thickness consistency, shape and electrical characteristics must all be considered in relation to the manufacturing equipment and process flow.

A larger wafer format can provide a broader usable substrate area for device fabrication and process integration. However, successful adoption depends on compatibility with the customer's epitaxial equipment, wafer handling system, process recipes and inspection procedures.

HMT's 200 mm HPSI 4H-SiC substrates are intended for customers evaluating or using large-diameter semi-insulating SiC material platforms. Technical discussions can cover wafer dimensions, resistivity requirements, geometry and surface specifications before production orders are placed. For customers evaluating smaller-diameter semi-insulating substrates, HMT also offers [4-inch and 6-inch low-MPD HPSI SiC substrates]

D Grade and P Grade HPSI SiC Substrates

HMT offers both D Grade and P Grade within its 200 mm HPSI semi-insulating SiC product range. Both grades belong to the same broad material category: 4H semi-insulating SiC.

The grade designation should be evaluated through the applicable product specifications rather than interpreted as a difference in electrical material type. Customers should compare the relevant electrical and physical acceptance criteria when selecting a grade for a particular process. Customers comparing semi-insulating and conductive substrate platforms can also review HMT's [8-inch conductive 4H-N SiC substrates]

Applications of 200 mm HPSI 4H-SiC Substrates

HPSI 4H-SiC substrates are relevant to semiconductor platforms where a highly resistive SiC foundation is required. Their potential applications include:

1. GaN-on-SiC RF Epitaxial Structures

Semi-insulating SiC is an established substrate option for GaN-based RF device structures. In GaN-on-SiC technology, the SiC substrate provides the supporting material platform beneath the epitaxial layers.

The substrate's thermal and electrical characteristics are considered together with the GaN epitaxial design, buffer structure and device architecture. A suitable HPSI substrate can support the development of RF HEMT platforms, subject to the customer's material and process requirements.

2. High-Frequency and Microwave Semiconductor Devices

High-frequency semiconductor structures require careful consideration of electrical isolation and parasitic effects. HPSI SiC can be evaluated for device platforms in which a highly resistive substrate is part of the overall material design.

Final device performance depends on the complete semiconductor structure, fabrication process and operating conditions.

3. Large-Diameter RF Epitaxy Development

A 200 mm HPSI substrate can be considered by customers developing large-diameter epitaxial processes or evaluating the transition of suitable device platforms to a larger wafer format.

Such development requires coordinated evaluation of substrate resistivity, wafer geometry, surface preparation and epitaxial process compatibility.

Custom Specifications and HMT Supply Support

Substrate requirements can differ significantly between RF device developers, epitaxial wafer manufacturers and semiconductor production facilities. For this reason, HMT recommends defining the technical requirements before confirming a supply specification.

When making an inquiry for 200 mm HPSI 4H-SiC wafers, customers may provide:

  
   # Required electrical resistivity range.

   # Preferred D Grade or P Grade configuration.

   # TTV, bow and warp requirements.

   # Intended epitaxial or device application.

These details allow the product configuration and inspection criteria to be reviewed against the customer's actual process needs.

HMT welcomes technical inquiries from semiconductor manufacturers, RF device developers and epitaxial wafer companies seeking 200 mm semi-insulating SiC substrates.