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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →In chip manufacturing, wafer size usually means the wafer’s nominal diameter—the width of the circular semiconductor disc on which integrated circuits are fabricated. Common categories are 150 mm (about 6 inches), 200 mm (about 8 inches), and 300 mm (about 12 inches). It describes the wafer, not the size of an individual chip.
What is a semiconductor wafer?
A wafer is a thin disc sliced from a high-purity semiconductor ingot. Silicon is widely used, though other materials, including gallium arsenide, are also used. Integrated circuits are formed on the wafer, which is later separated into individual chips.
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The ingot’s diameter determines the wafer’s nominal size. In ordinary usage, “wafer size” refers to this diameter, usually expressed in millimetres.
Common wafer diameters
| Nominal diameter | Approximate inch name |
|---|---|
| 150 mm | 6 inch |
| 200 mm | 8 inch |
| 300 mm | 12 inch |
The inch names are convenient approximations, not separate measurements. SEMI’s FAQ lists silicon wafer sizes including 2, 3, 100, 125, 150, 200, 300, and 450 mm: SEMI standards FAQ.
#1 Best Overall
- Wafer Pattern May Vary from the Product Images. Great to be used as gift, display object, exhibition, educating demonstration, testing, decoration or your collection
- Beautiful microchip pattern structure made by the advanced copper technology
- 90~130nm minimum microchip feature Copper Characterization with TEOS or Black Diamond Low-k ILD on the single crystal silicon wafer
- The original value of un-polished wafer is above $500
- No guarantee for research and other applications
What does a larger wafer size change?
A larger-diameter wafer has more surface area and can hold more chip dies. But diameter alone does not tell you how many usable chips a wafer will produce. Die dimensions, how dies are arranged near the wafer edge, and manufacturing yield all affect the result. There is no single chip-count figure that applies to every wafer of a given diameter.
Wafer diameter also does not determine how advanced a chip is by itself. SEMI’s 2021 supply-chain comments described advanced small-geometry designs using 300 mm wafers while noting that important devices were also made on 200 mm and 150 mm wafers. That is context from 2021, not a current market-share ranking or a rule that every advanced chip must use a 300 mm wafer: SEMI’s 2021 comments.
Rank #2
- Wafer Pattern May Vary from the Product Images. Great to be used as gift, display object, exhibition, educating demonstration, testing, decoration or your collection
- Beautiful microchip pattern structure made by the advanced copper technology
- 90~130nm minimum microchip feature Copper Characterization with TEOS or Black Diamond Low-k ILD on the single crystal silicon wafer
- The original value of un-polished wafer is above $500
- No guarantee for research and other applications
Does nominal wafer size equal its exact measured diameter?
Not necessarily. “300 mm,” for example, is a nominal category; processing such as edge trimming can make an individual wafer’s measured diameter differ. SEMI’s guide for a specific class of nominal 300 mm thin wafers on tape frames gives a maximum diameter of 301 mm and no fixed minimum. Those figures apply to that guide’s stated scope, not to all wafer sizes, materials, or specifications: SEMI 3D3 guide listing.
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A wafer is the larger disc used as a manufacturing substrate. A chip, or die, is one of the individual pieces separated from that wafer after fabrication. So a “300 mm chip” would be a misunderstanding in this context: 300 mm refers to the wafer’s nominal diameter, not to the width of each resulting chip.
Quick Recap
Best Value
- Genuine Silicon Wafer: crafted from high-purity silicon, this 12 inch silicon wafer features a precision double-side polished surface, delivering exceptional smoothness and mirror-like reflectivity on both sides, fitting well with tech decor needs; Please note: wafer pattern may vary from the product images
- Genuine Uncut Ic Silicon Wafer: this is a genuine uncut IC silicon wafer, not a replica or model; It preserves the original circular wafer form applied in semiconductor manufacturing, allowing you to experience real chip substrate material up close
- 12 Inch Large Size Versatile Display: with a full 12 inch diameter, this wafer provides a striking visual presence compared to smaller 6 or 8 inch wafers; Its larger size enhances the natural light interference patterns, creating subtle rainbow reflections under different lighting, ideal for desk display, office decor, exhibitions, or as a centerpiece for tech-inspired spaces; Silicon crystals are very fragile, please handle them as gently as possible
- Practical Stem Education Tool: a valuable teaching tool for STEM education, this semiconductor substrate helps illustrate how integrated circuits are manufactured; Great for classrooms, labs, or personal learning, it allows students to better understand wafer structure, fabrication processes, and the foundation of modern electronics in a tangible way
- Tech-inspired Gift: combining science and art, this silicon wafer makes a unique gift for engineers, programmers, students, and tech lovers, suitable for various gifting occasions without being overly decorative
Rank #4
- Method: CZ ; Size: 4inch ;
- Type: P-Type ; Dopant: B ; Orientation: 100 ;
- Resistivity:1-10Ω ; Thickness: 525um±25 ;
- Front Side: Polished ; Back Side: Etched ; TTV＜10um；
- [Nanosource] High Quality Silicon Wafer. Customized Products Available.
Rank #3
- 5 x 5 inches, 0.67 ounces, 0.03 inches thick. Some wafers are marked with alignment marks.
- The pattern is produced by light diffraction, and its reflective appearance changes with the viewing angle.
- Silicon wafers are fragile—please handle with care.
- Circuit details can be examined under a microscope.
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