Custom Bare Wafers Service

Bare wafers, also referred to as unprocessed wafers, are the primary starting substrates used in semiconductor device fabrication. They are composed of highly purified crystalline materials—most commonly silicon (Si), although compound semiconductor bare wafers such as GaAs, GaN, InP, and SiC are also widely used. Bare wafers are the fundamental substrate onto which patterns, epitaxial layers, or functional device structures will later be formed. Therefore, wafer quality directly impacts device yield, electrical performance, and long-term reliability. At Alfa Chemistry, we offer custom wafer services, including custom bare wafers service. Leveraging our extensive industry knowledge, analytical capabilities, and advanced processing technologies, we provide customers with tailored wafer products engineered for specific research, pilot production, or high-volume manufacturing needs.

Our customization capabilities include:

Key technologies and equipment include:

Crystal Growth & Formation

• Czochralski (CZ) and Float-Zone (FZ) silicon crystal growth systems
• High-purity furnace systems for dopant control and uniform crystallization

Wafer Slicing & Shaping

• Wire-saw slicing machines with micron-level tolerance
• Precision grinding and thinning systems for controlled thickness and TTV

Polishing and Surface Preparation

• Chemical-mechanical polishing (CMP) lines for atomic-level surface smoothness
• DSP polishing for applications requiring double-side uniformity

Surface Cleaning and Passivation

• Class-level wafer cleaning lines
• Dry and chemical cleaning technologies to remove particles and metal contamination

Quality Inspection and Characterization

• Optical and surface defect scanning (AFM, optical interferometry, dark-field scanning)
• Resistivity and dopant concentration mapping
• Thickness/TTV and flatness metrology
• XRD and TEM analysis for crystal structure verification
• ICP-MS, TOC and contact angle measurement for surface chemistry inspection

Our custom services can support the following areas:

• Integrated Circuits (IC) Fabrication: Logic, memory, and microprocessor device manufacturing where defect-free silicon substrates are critical for high performance and yield.
• Power Electronics: Wide-bandgap materials like SiC and GaN bare wafers enable high-power, high-voltage devices used in EVs, industrial power modules, and high-efficiency energy systems.
• Optoelectronics: InP, GaAs, and sapphire wafers support lasers, LED chips, optical sensors, and photonic devices.
• MEMS & Sensor Devices: Double-side polished silicon wafers can be used for MEMS accelerometers, pressure sensors, microphones, and advanced IoT sensor chips.
• R&D and Academic Research: Universities and R&D institutes frequently require specialty wafers for material studies or exploratory device development.