This paper will describe a new method being used during the finishing of glass displays for mobile electronics including
mobile hand held devices and notebook computers. The new method consists of using 3M TrizactTM Diamond Tile
Abrasive Pads. TrizactTM Diamond Tile is a structured fixed abrasive grinding technology developed by 3M Company.
The TrizactTM Diamond Tile structured abrasive pad consists of an organic (polymeric binder) - inorganic (abrasive
mineral, i.e., diamond) composite that is used with a water-based coolant. TrizactTM Diamond Tile technology can be
applied in both double and single side grinding applications. A unique advantage of TrizactTM Diamond Tile
technology is the combination of high stock removal and low sub-surface damage. Grinding results will be presented
for both 9 micron and 20 micron grades of TrizactTM Diamond Tile abrasive pads used to finish several common display
glasses including Corning GorillaTM glass and Soda Lime glass.
Results of a series of single sided lapping experiments designed to develop appropriate conditioning methods for 3M Trizact Diamond Tile fixed abrasives are reported. Trizact™ Diamond Tile is a structured fixed abrasive lapping technology developed by 3M. The Trizact™ Diamond Tile structured abrasive pad consists of an organic (polymeric binder)–inorganic (abrasive mineral, i.e., diamond) composite that is used with a water-based coolant. The effect of platen and conditioner speed on pad wear will be explored for a roller yoke single-side lapping machine. Pad break-in conditioning was studied in detail for a 6 micron Trizact™ Diamond Tile abrasive used to lap soda-lime glass.
Lapping is an important dimensioning and finishing technology that is used in many different industries including metal, electronic, and optical component fabrication, as well as silicon wafer production. In each of these applications lapping is used to produce flat substrates of a controlled thickness, flatness, and surface roughness. Lapping can be performed in either a single -sided or double -sided operation! Conventional lapping technology can be divided into two basic categories: loose abrasive grinding (slurry lapping) or fixed abrasive lapping. In slurry lapping the abrasive is in the form of an aqueous slurry of abrasive minerals (typically alumina or silicon carbide) and the lapping surface is the machine platen (typically cast iron).1 Conventional fixed abrasive lapping is also called "pellet lapping. In this process the abrasive (typically diamond) is incorporated into small pellets (metal, vitreous, or resin bond) which are attached to cast iron machine platens. The lapping surface during pellet lapping is formed by the top surfaces of all of the pellets. Here we report on a structured abrasive lapping technology developed by 3M. The structured abrasive pad consists of an organic (polymeric binder) - inorganic (abrasive mineral, i.e., diamond) composite and is used with coolant. Typical lapping coolants including deionized water are used as lubricants without the addition of any free abrasive mineral. Table 1 shows a comparison between conventional loose abrasive, pellet, and 3M fixed abrasive lapping technology.