I noticed the key lab the place smartphone glass is made (and tortured)

Check out your smartphone. The probabilities are extremely excessive that the sheets of glass protecting the back and front come from an organization referred to as Corning. You virtually definitely comprehend it by its extra well-known model title: Gorilla Glass.

Because the launch of the unique iPhone again in 2007, Corning’s glass has dominated the smartphone trade. Its glass is so ubiquitous that it’s change into the default materials for almost each main cellphone in the marketplace, together with the latest iPhone 17 sequence, Samsung Galaxy S25 sequence, Pixel 10 sequence, and plenty of extra. Regardless of this, Corning is a notoriously secretive firm. Its analysis and improvement services are tightly managed, with entry granted to a choose few.

Just lately, nevertheless, I had the uncommon alternative to peek backstage. I took a tour of Corning’s flagship R&D facility in a city referred to as, appropriately, Corning, positioned in upstate New York. There, I noticed firsthand how Gorilla Glass is made and realized concerning the completely bonkers methods Corning checks its sturdiness. It was a journey from a furnace hotter than a volcano to a sequence of untamed torture checks, and it gave me an entire new appreciation for the unsung hero of our digital lives.

One of many first stops on my tour was the furnace room, the place Corning melts down the uncooked supplies that make up Gorilla Glass. The room has a number of small furnaces, and specifically skilled Corning workers can conduct small batch checks on new glass merchandise.

To say this was an intense expertise could be an understatement. The molten glass glows with an otherworldly incandescence, churning away at a blistering 1,650 levels Celsius, or about 3,000 levels Fahrenheit. For context, that’s hotter than magma effervescent up from the Earth’s core. It’s so brilliantly vivid you can’t look instantly at it with out particular protecting eyewear.

However how does this glowing, molten goo change into the superbly flat, impossibly skinny sheet of glass in your cellphone? The magic lies in a proprietary manufacturing methodology that Corning calls the “Fusion course of.”

With “recipe” created on the R&D facility, the brand new product makes its approach to manufacturing. The uncooked supplies — a exact and secret assortment of sand and different inorganic supplies — are melted down in a big furnace. This molten glass is then fed right into a V-shaped trough referred to as an “isopipe.” The molten materials flows evenly excessive edges of the isopipe, forming two separate sheets that meet and fuse collectively on the backside.

The genius of this course of is that the only sheet of glass that emerges is fashioned solely in mid-air, touched by nothing however the ambiance round it because it cools and solidifies. As a result of it by no means comes into contact with one other floor whereas it’s in its viscous state, the glass is born with a pristine, completely easy floor that requires no grinding or sharpening. It’s this flawless high quality that offers it its inherent power, even earlier than any chemical strengthening.

Making an ideal sheet of glass is barely half the battle. How does Corning know will probably be sturdy sufficient to outlive the chaos of each day life? That’s the place the Gorilla Glass Reliability Lab is available in. That is the place Corning’s engineers do every part they will to chip, scratch, and shatter the glass they create. The objective is to design checks that mimic the real-life conditions your cellphone would possibly encounter, from being dropped on the sidewalk to being tossed in a handbag filled with keys.

Earlier than moving into the heavy equipment, I noticed a easy demonstration. I scraped a typical family key throughout a sheet of polycarbonate (plastic) and a sheet of Gorilla Glass. The important thing simply carved deep gouges into the plastic, however the Gorilla Glass got here away fully unscathed.

For a extra exact and scientific strategy, the crew makes use of a contraption they lovingly name the “Scratchbot.” This machine checks how properly glass survives scratches from abrasive supplies. The setup includes a number of weighted stems, every with a chunk of sandpaper on the tip. A deal with is pulled, dragging the sandpaper throughout completely different glass samples with a precise quantity of stress. In our take a look at, a pane of aggressive glass developed a nasty scratch below only one kilogram of stress. A pane of Gorilla Armor — the identical variety you’ll discover on a Samsung Galaxy S24 Extremely — wasn’t scratched in any respect by the identical weight. However then they upped the ante. The Gorilla Armor additionally survived a whopping 4kg of stress and not using a seen scratch.

We’ve all executed it: tossed our cellphone right into a backpack or purse with out pondering twice about what else is in there. Corning has a take a look at for that actual, all-too-common situation. To simulate the on a regular basis chaos of a bag, testers fill a big bottle with a set of widespread culprits: cash, keys, a nail file, a hairbrush, and different objects you would possibly discover alongside your cellphone.

As soon as the arsenal of potential scratch-inducers is loaded, a pane of glass is added to the combo. The container is then sealed and positioned on a machine that tumbles it finish over finish, making certain the glass will get totally bashed, scraped, and jostled by every part inside. It’s a easy however brutally efficient approach to see how the glass holds up towards the type of sustained, random abuse it’s prone to face when it’s not safely in your hand.

One other fascinating take a look at is the “pen push.” This take a look at is designed to see how a lot stress a chunk of glass can stand up to when it already has a flaw. To know this, think about attempting to separate a chunk of paper by tugging from two sides directly. If the paper is complete, it takes lots of effort. However in the event you introduce a tiny tear within the center, the paper instantly rips with little or no power. Scratches and micro-fractures in glass act similar to that tiny tear.

For this take a look at, three glass panels of the identical thickness, every with an an identical flaw within the center, had been used. The primary, a regular piece of soda-lime glass, shattered simply when pushed. The second, a chemically strengthened piece of soda-lime glass, took extra power however nonetheless broke. The Gorilla Glass panel, nevertheless, was a unique beast solely. I pushed with all my would possibly, even utilizing two fingers, and it merely wouldn’t break. The chemical strengthening course of creates a compressive layer on the floor of the glass that basically holds it collectively, stopping flaws from propagating and inflicting a catastrophic failure.

To imitate the violent impression of dropping a smartphone, Corning has a number of completely different instruments. Some of the enjoyable known as “The Slapper.” Whenever you drop your cellphone, the glass momentarily flexes and curves to soak up the vitality of the impression. The Slapper simulates this by holding a curved piece of glass and dropping it onto a metallic base lined in tough sandpaper, which mimics a harsh floor like asphalt. A non-Gorilla Glass pattern shattered immediately. However the Gorilla Glass pattern, even when dropped from the very prime of a a lot taller “mega slapper,” didn’t break in any respect.

For extra exact evaluation, Corning makes use of the System Drop Tower. This can be a very tall machine that may drop telephones on the pace of gravity and hit a precise spot on the ground under. Excessive-speed cameras movie the impression from a number of angles, permitting the crew to investigate precisely what occurs in the intervening time of impression. For our demo, they used weighted mock gadgets, referred to as “pucks,” to simulate the heft of an actual cellphone. I watched them fall from numerous heights onto a tough floor, and every time, the Gorilla Glass survived. Whereas I didn’t see them in motion, Corning confirmed me cabinets of varied surfaces to check towards, together with precise asphalt, concrete, granite, chrome steel, and even carpet.

What was actually wild about this go to was studying simply how deeply embedded Corning is within the historical past of recent expertise. We Android followers consider Corning as a smartphone glass maker, however the firm has been a pioneer in glass science for almost 175 years (its one hundred and seventy fifth birthday is developing in 2026). The R&D facility I visited in Corning (from which the corporate will get its title) is a testomony to that legacy. It’s an enormous campus with 800 labs, 2,000 workers, and two million sq. ft of house devoted to inventing the way forward for supplies.

Corning’s impression extends far past our pockets. The glass for the very first Edison lightbulb was made by Corning. The earliest tv tubes used Corning glass. The corporate is chargeable for creating the fiber optic cabling that varieties the spine of the web, and at this time there are greater than 5 billion kilometers put in across the globe. Even the home windows on the House Shuttle had been a Corning innovation.

So, the following time you choose up your cellphone to ship a textual content or scroll by means of your feed, take a second to consider the unimaginable quantity of science and engineering that went into creating simply the glass that covers it. And whereas it was enjoyable to look at these torture checks, perhaps don’t go deliberately dropping your cellphone on concrete to check Corning’s high quality for your self. The glass is extremely robust, however because the engineers will inform you, it’s not unbreakable — no less than, not but.