Gorilla Glass History | Gorilla Glass Scratch | Gorilla Glass Touch Screen

Touch screen technology in fast few years has grown drastically in various applications, in order to overcome the difficulties faced by the touch screen; a new frontier technology has to take its part to revitalize the use of touch screen. In this counterpart gorilla glass has thrown a flash light focus on touch screen technology. Gorilla Glass has taken an apt plays in touchscreen technology. This scratch repellent glass is used to form touchscreen panel for portable gadgets like ATM machines, android mobile phones, tablets, personal computers and MP3 Players. It’s designed to protect display screens from scratches, sticky oils, fractures, etc,.

01-Gorilla Glass Phones - Gorilla Glass Protection

Characteristics of Gorilla Glass:

  • Scratch resistance
  • Slimness / Thinner
  • Stronger
  • Improved Touch Sensitivity

Comparatively perfect fit for today’s abundance touch-screen handsets.

01-Gorilla Glass Screen - Gorilla Glass Display - Gorilla Glass Devices

Difference between ‘Scratch- Proof ‘ and ‘Scratch Resistant’ glass:

A Scratch- screen proof is impermeable resistant to scratches. This kind of technology is not on the market however – any glass may break if it is placed under enough stress. Gorilla Glass is NOT a scratch-proof.

01-Gorilla Glass vs scratch resistant glass

A Scratch- screen resistant is much stronger than most screens. It is less probable to smash/crack if dropped, and less probably to scratch if scratched. Extreme force, sharp objects, and continual exposure to abrasive oils may leave scratches.

01-Gorilla Glass vs Normal Glass - Gorilla Glass benefits

History of Gorilla Glass:

The Gorilla Glass is the trade name of “Corning”, an United States of America Glass maker. They form the toughened glass (Alkali – Alumino Silicate Sheet) for the portable electronic gadgets. This idea generated in the 60s period as a project name, “Project Muscle”. The glass invented was called as “Chemcor” glass, which are ultra strong and light weight. The product is developed for windshield glass for cars, But the product is very costly so they are not succeeding on that time.

In the period of 2005, they again started researching with the project name of “Gorilla Glass”. In this period touch screen cell phones are popular, and the product needs a resilient, scratch resistant cell phone cover glass. At that time, the company take the idea from Chemcor glass and they start building the Gorilla glass.

After completing the research, first production starts at the period of 2007 and they got the first order in the period of 2008. At that period nearly 200 million users (about 20% of Devices) uses the gorilla glass for their cell phones.

01-Gorilla Glass Scratch - Gorilla Glass Fail

In 2012, the second generation of gorilla glass they built and launched, achieved a goal of one billion devices.

01-Gorilla Glass Scratch - Gorilla Glass Nokia

In 2013, the Third generation Gorilla Glass they launched, which are three times more resistant and stronger; 40% scratches which occur will not be visible to naked eye.

Currently Used Gorilla Glass products:


  • Iphone
  • HTC
  • LG
  • Motorolla
  • Nokia
  • Samsung

01-Gorilla Glass Phones - Gorilla Glass Nokia


  • Samsung
  • Blackberry
  • Lenovo

01-Gorilla Glass Tablet - Gorilla Glass Android


  • Dell
  • Sony
  • Lenovo

01-Gorilla Glass Laptop - Gorilla Glass Laptop Screens


  • Sony

01-Gorilla Glass TV Screens - Gorilla Glass Sony TV


  • Leica

01-Gorilla Glass Cameras - Gorilla Glass Leica



• Glass designed for a high degree of chemical strengthening

– High compressive stress

– Deep compression layer

• High retained strength after use

• High resistance to scratch damage

• Superior surface quality


• Ideal protective covering for displays in

– Smart phones

– Laptop / Portable Computers and tablet computer screens

– Mobile devices

• Touchscreen devices

• Optical components

• High strength glass articles

Welding Technology | Electro Gas Welding (EGW)

Electro Gas Welding:

Electro Gas Welding is an arc welding process that uses an arc between a continuous filler metal electrode and the weld pool, employing vertical position welding with backing to confine the molten weld metal. Electro gas welding is very much similar to electro slag welding except that an inert gas such as carbon di oxide is used to shield the weld from oxidation and there is a continuous arc as in the case of submerged arc welding to provide the heat for heating the weld pool. Again the flux instead of being supplied to the weld zone through a hopper is incorporated in electrode itself in the form of flux cored electrodes, or sometimes the process may be carried out without using the flux in which case there is no flux covering on the top of the molten metal pool.

01-electrogas welding - narrow gap welding - EGW process

Electro gas welding process is used for welding low and medium carbon steels, alloy steels and austenite stainless steels.

Plates from 12.5 to 75 mm thickness can be welded. For thicker plates it is preferable to use electro slag welding instead of electro gas welding because it may be difficult to obtain adequate shielding gas coverage with the latter process.

CO2 gas is used as an inert gas to protect the welding from atmosphere contamination.

01-electro gas welding


First thick plate vertical welding method was electro slag welding. Demand arose immediately for equipment that would apply the process to thinner sections. Then in 1961, laboratory studies with an electro slag welding machine adapted to feed auxiliary gas shielding around a flux cored electrode that made the vertical welding of 13mm thin plates. This technique is called electro gas welding.


1. High deposition single pass welding with code quality welds

2. Carriage and rail system to handle vertical seams up to 3m

3. Linear oscillator to weld up to 40mm plate in a single pass

4. Powered lateral travel frame to create an “indoor” atmosphere for high quality site welding

5. Weld thickness ranges from 12mm to 75mm

6. Metals welded are steels, titanium, aluminium alloys

01-Electro Gas Welding - CO2 shielding gas - inert gas welding


Building of Storage tanks, Vertical Vessels, Blast furnaces, Chemical Furnaces, Ship Building, thick walled and large diameter pipes, Bridges etc


1. Weld is better visible to the operator

2. Restarting the weld is quicker

3. Welded joints have better mechanical properties such as impact strength

4. High Welding efficiency with high current / High deposition rate

5. Less angular distortion due to a small number of welding passes

6. The heat – affected zone can be softened and embrittle caused by the welding heat input.

01-Electric Gas welding for vertical-up direction - electrogas welding set-up


1. The weld produced are not as clean and crack free as those produced by electro slag welding

2. It has more porosity particularly for the thicker jobs

3. Incomplete Fusion to One Sidewall is caused by asymmetric thermal conditions such as poor heat distribution and insufficient heat

4. Overlap is caused by weld metal flow out of the joint without melting the base metal

5. Hot cracking can be caused by the partial dissolution of the copper molding shoes, here the cracks are generally at near the surface