Why Weiman Tech Can Be Your Reliable OEM Touch Screen Glass Supplier?

✅First. One stop in house processing, no headaches of subcontracting.

From cutting, CNC edging / shaping, tempering(chemically & thermally), silkscreen printing and coatings, all done in house.

✅Second.Precision fabrication to match your design.

Base on your tolerance, we will choose laser(+/-0.02) and CNC(+/-0.05) processing.

✅Third. Coating & Bonding.

In OEM touch screen glass market, 3A(AR, AG, AF) used frequently, you will get ideal coatings base on your need.

We also offer bonding services like 3M tape, AB glue etc.

✅Forth. No MOQ and flexible lead time.

We fully understand different projects with vary demands, we don’t have special requirement on MOQ to offer fully support.

Our lead time also depends on your need, we can make various adjustment to meet.

What We Can Processes To Be Applied In OEM Touch Screen Glass? See below:

1.Cutting

Diamond unit in full automatic machine to cut into shapes.

2.Shaping & Drilling

Laser cut(Tolerance +/-0.02) & CNC(Tolerance +/-0.05) for edging grinding & hole drilling.

Advantages & Disadvantage:

Laser cut, the advantages are precision tolerance(+/-0.02mm) and fast processing. But chamfer by CNC / manual needed, couldn’t shape into specific edge(Like 2.5D).

CNC, the advantages are customizable different edges, polish and chamfer done at the same time. But process time & cost a little higher than laser and larger tolerance.

3.Tempering

Thermally tempering VS chemically strengthening

Advantages & Disadvantages:

Thermally tempering, it suitable for thickness above 3mm and belong to safe glass, lower cost. But weaker in flatness.

Chemically strengthening, it suitable for thin glass(thickness 3mm below) with excellent hardness & flatness performance. But weaker in cost and not belong to safe glass.

4.Silkscreen Print

Low temperature ink & Ceramic ink

Advantages & Disadvantages:

Low temperature ink, suitable for high hiding purpose & more “fresh” color in chemical strengthened. But weaker in adhesion and UV resistance.

High temperature ink, suitable for outdoor application which can’t peel off even scratch by knife. But weaker in light block and “lively” color.

5.Coatings

• AR(Anti reflective) coating, usually the substrate of OEM Touch Screen Glass light transmittance is around 91% +, each side coating increase 3-4%, both sides 99% at highest.
• AG(Anti glare) coating, it used on OEM touch screen glass surface for outdoor / strong light condition to avoid light to the eye directly avoid danger.
• AF(Anti fingerprint) coating, inspired by lotus leaf principle, it can allow glass easy wipe off the fingerprint, dirt and protect AR coating from easy peel off.

6.Cleans

Ultrasonic clean VS water clean

Usually we use ultrasonic cleaning to make glass surface much clean, suitable for high surface quality performance but time & cost higher.

To water cleaning, it’s fast but clean grade is weaker than ultrasonic clean, which more often used in light & appliance glass.

FAQ About OEM Touch Screen Glass

Question 1: The silkscreen ink keeps peeling off along the edge after curing, what’ wrong?

Answer 1: Check your oven temperature profile first. Most OEM glass uses a two-stage cure: 80°C for 10 minutes then 150°C for 30 minutes. If you skip the first stage, the solvent traps air bubbles under the ink: Those pop during cooling and lift the edge. Also run a cross-hatch tape test: if more than 5% of the grid comes off, your ink batch or surface treatment is the issue.

Question 2: How can I verify the AR coating is actually on the OEM touch screen glass and not just a cheap substitute?

Answer 2: Rub a small area with isopropyl alcohol using moderate pressure for 10 strokes. Genuine AR (multi-layer sputtered) won’t show any color change.

Fake AR: Usually just a single dip-coating will turn slightly yellowish or show rainbow streaks after rubbing.

Also tilt the glass under a daylight lamp: real AR reflects faint purple/blue. Anything greenish means it’s the wrong stack.

Question 3:The AG surface feels gritty and leaves wipe marks, is that normal or a defect?

Answer 3: AG finish is supposed to be matte, but not rough. Run your fingernail across the surface: If you hear a scratching sound, the etching depth is too deep (should be around 0.8–1.2μm Ra).

For a quick check: drip one drop of water on it. A good AG surface gives a contact angle of 95–105° and the water bead rolls off without a tail. If the bead flattens or leaves a trail, the etching bath was over-cooked.

Question 4:AF coating wears off within a week of testing, how do I catch this before production?

Answer 4: Don’t trust the initial water contact angle reading (110°+ means nothing fresh out of the box). Run a steel wool abrasion test: 0000-grade steel wool, 1kg load, rub back-and-forth 2000 times. After that, remeasure the contact angle. If it drops below 85°, the AF thickness is under 8nm or the evaporation deposition wasn’t done in vacuum: It’ll fail in the field. We reject any batch that drops more than 15° after this test.

Question 5:Can I apply AF coating over an already-coated AG+AR glass, or does that ruin the optics?

Answer 5: You can, but the order matters. AG etching changes surface roughness and AR sputtering fills some of those micro-valleys. If you apply AF on top of that, the thickness stack shifts. We’ve seen AR reflection jump from 0.8% to 2.5% just because the AF layer added 10nm of refractive index mismatch. Best practice: ask the supplier to do AR→AF in one vacuum run, then AG only if absolutely needed. Post-coating AF spraying never bonds well to AG surfaces, it peels in patches within 3 months.