Photo Reticle’s Stealth Dicing vs. Diamond Dicing Services: A Guide to Precision Singulation
In the manufacturing of high-quality components for the optoelectronics and photonics industries, precision is the ultimate benchmark. The quality of the cut is the most critical factor when selecting a dicing technology.
At Photo Reticle, we utilize two primary industry-leading methods: Stealth Dicing (Laser Technology) and Diamond Dicing. While both techniques offer unique advantages, they differ significantly in machinery, process, and ideal applications. If you are evaluating stealth dicing vs. diamond dicing for your next project, here is an in-depth look at the differences.
1. Stealth Dicing: Precision Through Laser Irradiation
Stealth dicing is an innovative, “dry” technique developed to overcome the physical limitations of conventional dicing. Unlike traditional methods, this style focuses a laser beam inside the substrate rather than on its surface.
The Process: Contactless Internal Modification
Machinery: Our stealth dicing system utilizes an ultra-fast picosecond ultraviolet (UV) laser.
Contactless Cutting: Because it is a laser-based process, there is no physical blade contact. This eliminates the need for cooling water and prevents the generation of surface debris.
Mechanism: The laser creates a “modified layer” within the wafer’s internal structure. Subsequently, a high-energy pulse generates a stress wave, causing the wafer to separate cleanly along the modified path.
Ideal Applications: Brittle & Transparent Materials
Stealth dicing is the premier choice for cutting brittle, transparent substrates such as glass, sapphire, and quartz.
Zero Kerf Loss: This technique allows for “no kerf” dicing, meaning you can fit more components onto a single wafer, significantly increasing your total die yield.
Industry Use: It is highly advantageous for optical sensors, photonics, and complex optoelectronic devices where contamination and chipping must be avoided.
2. Diamond Dicing: Traditional Mechanical Singulation
Diamond dicing is the established industry standard for cutting a wide variety of rigid materials. This process is mechanical, relying on a precision diamond-coated blade and a water-based cooling system.
The Process: Mechanical Contact Cutting
Contact Cutting: The diamond blade makes direct physical contact with the wafer to create individual chips.
Cooling & Cleaning: A continuous stream of water is used to cool the blade and clear away debris. Following the cut, a specialized cleaning step is required to remove residual particles from the component surfaces.
Ideal Applications: Rigid & Non-Transparent Materials
Diamond dicing remains the default and most effective method for:
Silicon Wafers & Ceramics: Its mechanical strength is ideal for these rigid substrates.
Non-Transparent Substrates: For materials where laser light cannot penetrate or focus internally, the diamond blade provides a reliable, consistent cut.
Limitations: While robust, diamond dicing poses a higher risk of edge chipping on delicate or ultra-thin brittle materials compared to laser methods.
3. Choosing Your Service at Photo Reticle
As one of the longest-standing suppliers of specialty components in the optoelectronics industry, Photo Reticle is continuously scaling our capabilities to meet modern demands.
Choose Stealth Dicing for high-yield requirements, ultra-thin transparent wafers, and applications where water sensitivity is a concern.
Choose Diamond Dicing for standard silicon-based components and rigid ceramic substrates.