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3" Silicon Wafers
N/PH <100>, 1-10 Ohm-cm, 381±25 µm thick, Prime Grade, SSP, Two Semi-Standard Flats.
The wafers were used for soft lithography and the fabrication of microfluidic devices.
Silicon Wafers Used for Soft Lithography
Researchers worldwide use silicon wafers as master substrates for soft lithography, microfluidic device fabrication, PDMS molding, biosensors, and lab-on-a-chip applications. The exceptional flatness, surface quality, and dimensional stability of silicon make it the preferred material for producing highly accurate microstructures and nanostructures.
A PhD researcher shared the following feedback after purchasing silicon wafers:
Reference #211786 for specifications and pricing.
Soft lithography is one of the most widely used microfabrication techniques for creating microfluidic channels, cell culture platforms, biosensors, and biomedical devices. The process commonly utilizes SU-8 photoresist to create a patterned master mold on a silicon wafer. Once fabricated, the mold can be replicated using PDMS (Polydimethylsiloxane) to produce highly detailed structures with micron-scale resolution.
Researchers frequently choose silicon wafers because they provide excellent surface quality, high pattern fidelity, and compatibility with standard semiconductor manufacturing processes. These characteristics help ensure consistent results for both research and production applications.
Popular Silicon Wafer Specification for Soft Lithography:
Item #452 – 100mm P-Type <100> Silicon Wafer, 0-100 Ohm-cm, SSP, 500µm Thick, Test Grade
In addition to soft lithography, these wafers are commonly used in PDMS microfluidic systems, organ-on-chip devices, micro-organoid cell culture platforms, MEMS research, and biomedical diagnostics.
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Silicon Wafers for Single-Cell and Microchip Research
Silicon wafers are frequently used in advanced biological and neuroscience research involving single-cell analysis and high-density microchip arrays. Their smooth surface and compatibility with photolithography allow researchers to fabricate precise microwell structures for cell isolation and protein analysis.
Reference #1250939 for specifications and pricing.
Researchers fabricated a PDMS microwell chip using a chrome photomask and SU-8 photoresist on a 4-inch silicon wafer. The silicon wafer served as the master mold for creating thousands of microwells used for biological analysis. The resulting PDMS structures contained wells measuring approximately 75µm × 75µm × 40µm and were used for high-throughput cellular research.
The ability to repeatedly fabricate highly uniform microstructures makes silicon wafers ideal for biomedical engineering, neuroscience, cell culture, and microfluidic device development.
University NanoScale Laboratories Use Silicon Wafers for Microfluidic Fabrication
University research laboratories routinely use silicon wafers to fabricate microfluidic chips, PDMS molds, and microelectromechanical systems (MEMS). The wafer surface serves as a reliable platform for photolithography, etching, and mold fabrication processes.
A doctoral researcher requested the following specification:
Silicon Wafer Item #447
76.2mm Diameter, P-Type Boron Doped, <100> Orientation, 0-100 Ohm-cm, 406-480µm Thick, Single Side Polished, Test Grade.
These wafers are commonly selected for soft lithography, microfluidics, MEMS development, biosensor fabrication, and semiconductor research requiring high-quality silicon substrates at an economical price point.
How Silicon Wafers Are Used in Soft Lithography for Microfluidic Device Fabrication
Silicon wafers are the preferred substrate for soft lithography because they provide exceptional flatness, dimensional stability, and compatibility with standard semiconductor processing techniques. Researchers use silicon wafers to create master molds that enable the fabrication of highly precise microfluidic devices, biosensors, lab-on-a-chip systems, and microelectromechanical systems (MEMS).
The process typically begins with coating a polished silicon wafer with a layer of SU-8 photoresist. A photomask containing the desired microchannel design is aligned over the wafer and exposed to ultraviolet (UV) light. After development, the patterned SU-8 structures form a durable master mold that can be repeatedly used to replicate micro-scale features.
Once the master mold is prepared, polydimethylsiloxane (PDMS) is poured onto the patterned surface and cured. The cured PDMS layer is then peeled away, producing an exact replica of the microstructures formed on the silicon wafer. This replica can be bonded to glass or another PDMS layer to create sealed microfluidic channels capable of controlling fluid flow with high precision.
Because silicon wafers offer excellent surface quality and low defect densities, they are widely used in research involving organ-on-chip devices, biomedical diagnostics, chemical analysis systems, and advanced semiconductor packaging technologies.
What is Silicon Soft Lithography?
Silicon soft lithography is a microfabrication technique that uses patterned silicon wafer molds to create structures ranging from a few microns down to nanoscale dimensions. Unlike traditional semiconductor manufacturing processes that require expensive equipment and complex processing steps, soft lithography provides a cost-effective method for producing intricate patterns with excellent repeatability.
The technique relies heavily on elastomeric materials such as PDMS, which can accurately reproduce microscopic features while remaining flexible and easy to handle. As a result, soft lithography has become one of the most widely adopted fabrication methods for prototyping and low-volume production of microfluidic devices.
Researchers frequently choose silicon substrates because they are compatible with standard cleanroom processes such as photolithography, plasma etching, thermal oxidation, and thin-film deposition. This compatibility allows silicon molds to be integrated into existing semiconductor manufacturing workflows.
Applications of silicon soft lithography include:
- Microfluidic chips
- Lab-on-a-chip devices
- Biomedical sensors
- Optical waveguides
- Cell culture platforms
- MEMS devices
- Microreactors
- Nanoimprint lithography masters
What is Hard-Contact Lithography?
Hard-contact lithography is a photolithography method in which a photomask is placed directly against the photoresist-coated wafer surface. This direct contact minimizes diffraction effects and improves pattern resolution compared to proximity exposure techniques.
The quality of the silicon wafer surface is critical for successful hard-contact lithography. Researchers often require wafers with minimal scratches, low total thickness variation (TTV), and high flatness to ensure intimate mask-to-wafer contact. High-quality prime-grade silicon wafers are frequently selected for applications requiring fine feature sizes and highly repeatable pattern transfer.
Hard-contact lithography remains popular in academic and industrial research because it combines relatively low equipment costs with excellent pattern fidelity. It is commonly used in the fabrication of microfluidic molds, MEMS structures, biosensors, and photonic devices.
Silicon Wafers for PDMS Microfluidic Platforms
Many research groups use silicon wafers to manufacture PDMS-based microfluidic platforms for biological and medical applications. These systems allow scientists to study cellular behavior, drug interactions, tissue engineering, and organoid development under highly controlled conditions.
The combination of silicon master molds and PDMS replication enables rapid prototyping while maintaining the dimensional accuracy required for advanced microfluidic research. Silicon wafers are particularly valuable because they support the fabrication of channels, wells, reservoirs, and other structures that would be difficult to produce using conventional machining methods.
Universities, government laboratories, and commercial research facilities routinely utilize silicon wafers for:
- Micro-organoid cell culture systems
- Single-cell analysis devices
- Biomedical diagnostic chips
- Droplet microfluidics
- Point-of-care testing devices
- Microreactor development
- Tissue engineering research
Why Researchers Choose Silicon Wafers for Soft Lithography
Silicon remains the industry standard material for soft lithography master fabrication due to its outstanding mechanical and surface properties. Silicon wafers offer exceptional flatness, thermal stability, chemical resistance, and compatibility with semiconductor processing equipment.
Whether producing a simple PDMS mold or a sophisticated microfluidic platform, researchers benefit from the repeatability and precision that silicon substrates provide. Combined with SU-8 photoresists and PDMS replication techniques, silicon wafers continue to play a critical role in the advancement of microfabrication, biotechnology, photonics, and semiconductor research.