Based on arecent Chipworks teardown, Apple's bill of materials is probably about $260, RBC Capital Markets analyst Amit Daryanani argued in a memo obtained byAppleInsider. Given an entry retail cost of $399, that would indicate a profit margin of roughly 35 percent, lo...
The size of tip radius had a great influence on diamond machinability of tungsten carbide. A nano-scale surface roughness can be obtained by using diamond tool with smaller tip radius and no defects were found on the machined surface. (3) A method of inclined ultrasonic vibration cutting with...