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I suppose it is a testament to Corning's marketing that they are held in such high regard, but doesn't the Nexus 4 have the new Gorilla glass? Wired claimed it
by Kylekramer 14y ago
I suppose it is a testament to Corning's marketing that they are held in such high regard, but doesn't the Nexus 4 have the new Gorilla glass? Wired claimed it did: http://www.wired.com/gadgetlab/2012/10/nexus-hands-on-with-googles-new-flagship-phone/ http://www.wired.com/gadgetlab/2012/10/nexus-hands-on-with-g...
- Osmium 14y agoIt's not unlikely that they only went with Gorilla glass for the screen-side of the device to cut costs, though I know the article says otherwise, so maybe not. They could've also mounted it in a way other than what was designed (i.e. put it under tensile stress). As for Corning, in fairness to them they were instrumental in the development of this type of glass and own a fair few patents, so it's not just marketing. They developed it originally in the 60s, though I imagine a lot has changed since then.
- deleted 14y ago[deleted]
- yen223 14y agoScratch resistance and toughness are orthogonal to each other. Even diamonds will crack when applied with a certain force. From what I understand, Gorilla Glass is only scratch-proof, not tough.
- prawks 14y agoIt does, on the front and back [1]. I took a set of keys, a fork and a pocket knife to the front and back glass panels of the Nexus 4 and couldn't get a scratch to show up anywhere. I also slipped and dropped the phone while pulling it out of my pocket this week, and it showed no signs of my fumble. Until I see a video, I'm not really convinced, tbh. If he has a granite counter-top, and didn't set it down as gently as the author claims, it's completely probable that it cracked. People are incredibly clumsy with phones. Glass doesn't exactly have a high thermal conductivity (nor does granite/linoleum/plastic), I find it difficult to believe the glass would expand/contract enough from body heat/kitchen counter-tops. [1] http://www.wired.com/reviews/2012/11/google-nexus-4/ http://www.wired.com/reviews/2012/11/google-nexus-4/
- deleted 14y ago[deleted]
- kragen 14y agoYour comment is wrong from beginning to end. Normal window glass is Mohs hardness 5.5 or so, as is unhardened steel (your fork and pocketknife); hardened steel (e.g. a metal file) is more like 6.5. That means you can scratch regular steel with glass and vice versa, with some difficulty. (Try it. I just did.) Brass (your key) is around 3 or 4, so it won't scratch glass. There are lots of things with Mohs hardness above 5.5, including most common metals (except brass, aluminum, copper) and most rocks. Sand is almost never made up of glass particles. It's often made up of crystalline quartz (Mohs hardness 7) which can scratch regular glass easily. Gorilla Glass has Mohs hardness of about 9, so quartz won't scratch it.
- bryanlarsen 14y agoDeleted. Thanks for making your comment standalone so nobody else has to waste their time reading mine.
- kragen 14y agoI'm glad it is helpful!
- Osmium 14y agoNotable, then, is the fact that Apple felt the need to make their lens covers out of sapphire (Mohs hardness of 9). If they were using Gorilla glass on the back, and it has the hardness you claim, then surely that isn't necessary?
- ktsmith 14y agoOptical sapphire has different properties than gorilla glass. There can be reasons other than hardness for using a material as a lens cover.