For laboratory work with rigid ITO glass, the Qunguan 50 × 50 mm slides offer a stated 6–8 ohm/sq resistance and at least 84% transmittance; the 21-piece pack is better for projects needing more substrates. For flexible electronics, the ITO-coated PEN film is the relevant option. The supplied product list contains only three ITO-coated materials; the other two listings are polishing products, not ITO glass, so they are excluded.
| Product | Format | Best For | Listed Resistance |
|---|---|---|---|
| Qunguan 50 × 50 mm slides | Rigid glass, 8 pieces | Higher stated transmittance | 6–8 ohm/sq |
| Qunguan 50 × 50 mm substrates | Rigid glass, 21 pieces | More substrates per pack | 7 Ω/square in product name |
| Qunguan ITO-PEN film | Flexible film, 2 pieces | Flexible electronics prototypes | 6 ohm/sq |
Qunguan 50 × 50 mm ITO Glass Slides
Best for: Lab users who want rigid, square ITO substrates with a stated transmittance specification. This pack includes eight 50 × 50 × 1.1 mm slides. The listed sheet resistance is 6–8 ohm/sq, measured by a four-point probe, and the stated transmittance is at least 84%.
The product listing also gives a coating thickness of 1850 Å and describes the surfaces as fully conductive. It identifies applications such as thin-film solar cells and other optoelectronic work. These details make it a straightforward choice when the project needs glass rather than a flexible substrate.
Limitation: The slides are 1.1 mm thick and rigid, so choose a flexible film if the design needs bending. Confirm that the stated resistance range and transmittance meet the requirements of your process.
Qunguan 21-Piece ITO Glass Substrates
Best for: Buyers who need a larger supply of compact rigid substrates. The pack contains 21 CNC-cut pieces, each 50 × 50 mm and 0.7 mm thick. The product name specifies 7 Ω/square. Its thinner profile and higher piece count distinguish it from the eight-piece, 1.1 mm slide pack.
The listing states glass roughness below 1 nm RMS and ITO roughness of 1.8 nm RMS, both measured by AFM. It describes the surfaces as fully conductive and names laboratory applications, including thin-film photovoltaic substrates. These specifications may help buyers compare surface characteristics as well as quantity.
Limitation: The listing does not state a transmittance value in the supplied product details. If optical transmission is a critical acceptance criterion, request or verify the relevant specification before selecting this pack.
Qunguan ITO-Coated PEN Flexible Film
Best for: Prototyping flexible electronics where rigid glass is unsuitable. The package contains two ITO-coated PEN sheets measuring 195 × 255 mm, with a listed thickness of 0.125 mm. The stated sheet resistance is 6 ohm/sq, and visible-light transmittance is at least 81%.
The listing says the film can be cut with scissors and identifies PEN as the substrate. It gives a maximum operating temperature of up to 180°C and short-term temperature resistance of 200–220°C. The product is a better fit than glass when flexibility and a larger cut-to-size sheet matter.
Limitation: This is film, not glass, and its listed transmittance is lower than the 84% minimum stated for the first glass-slide product. Remove the protective film before use, as instructed in the listing, and check the temperature limits against the process.
Buying Guide: How to Choose ITO Glass or Film
Do you need a rigid substrate or a flexible one?
Choose glass for a rigid laboratory substrate or a process designed around glass. The two listed glass options are both 50 × 50 mm, but they differ in thickness and pack size. Choose ITO-PEN film when the design needs a flexible sheet that can be cut to shape. Do not treat PEN film as a glass slide; the substrate and handling characteristics differ.
Which sheet resistance should you compare?
Sheet resistance is reported in ohms per square and is a key electrical specification for conductive coatings. The first glass listing gives a range of 6–8 ohm/sq, the second product name states 7 Ω/square, and the PEN listing states 6 ohm/sq. These figures are listing specifications, not a guarantee that every individual piece has an identical measured value. Confirm measurement method and acceptable tolerance for precision work.
How important is optical transmission?
Compare transmittance only when the listing provides a value and check that the measurement refers to the visible-light range relevant to your application. The first glass product states at least 84%; the PEN film states at least 81% visible-light transmittance. The supplied details for the 21-piece glass pack do not include a transmittance figure, so avoid assuming it matches either of the other products.
What dimensions and quantity should you check?
Match substrate dimensions to your fixture, deposition setup, or prototype layout before ordering. The glass products are each 50 × 50 mm, with thicknesses of 1.1 mm and 0.7 mm, respectively. The PEN sheets are 195 × 255 mm and 0.125 mm thick. Pack quantities are eight slides, 21 substrates, and two film sheets.
Why are polishing products not included?
The other two supplied listings describe rock-tumbler polish and cerium oxide/tin oxide polish. Their supplied information does not identify them as ITO-coated glass, conductive substrates, or flexible ITO film. They are therefore not suitable substitutes for the materials compared here.
Frequently Asked Questions
What is indium tin oxide glass used for?
ITO glass is transparent conductive glass used as a substrate in applications such as displays, optoelectronic devices, and thin-film solar cells. The supplied product listings specifically describe laboratory and thin-film photovoltaic uses.
Is ITO glass flexible?
No. The listed ITO glass products are rigid substrates. The ITO-coated PEN product is the flexible-film option in this selection.
What does ohm per square mean on an ITO listing?
Ohms per square is the unit used to state sheet resistance for a thin conductive layer. Compare the listed values with the electrical requirements of your project and verify tolerances when precision is important.
Which option lists the highest transmittance?
The 50 × 50 mm, 1.1 mm-thick glass-slide product lists transmittance of at least 84%. The PEN film lists at least 81% visible-light transmittance. No transmittance value was provided for the 21-piece glass pack.
Can I cut the ITO material to size?
The PEN-film listing explicitly says the film can be cut with scissors. The glass listings do not provide equivalent cutting instructions, so do not assume they can be cut the same way.