t in islam world, writing and scribing koran has been always a very important issue. professional  scribers and calligraphers of koran were in the acme point of this process. scribing diversity as  well as different styles of writing divine words does not contradict with uprightness in recording  koran words so that in addition to observing this principle, great calligraphers have tried to  scr...

This paper investigates the effect of crystallographic orientation on the mode of material removal (ductile vs. brittle) in diamond scribing of single crystal silicon (c-Si) and offers an explanation for the observed effects in terms of the combined role of phase transformation and slip generation. Single-point diamond scribing tests are performed on (111), (001) and (110) crystallographic plan...

Billions of LEDs are used today in traffic control, automotive headlights, flat panel display technology, mobile devices, back lighting, projection and general illumination applications. With the dramatic growth in LEDs, manufacturers are looking for technologies to increase production yield and decrease cost. Sapphire wafer singulation into miniature dies is one of the critical steps used in b...

In this paper, we investigate the laser processing of the CIGS thin-film solar cells in the case of the high-speed regime. The modern ultra-short pulsed laser was used exhibiting the pulse repetition rate of 1 MHz. Two main P3 scribing approaches were investigated - ablation of the full layer stack to expose the molybdenum back-contact, and removal of the front-contact only. The scribe quality ...

Laser scribing is an important manufacturing process used to reduce photocurrent and resistance losses and increase solar cell efficiency through the formation of serial interconnections in large-area solar cells. High-quality scribing is crucial since the main impediment to large-scale adoption of solar power is its high production cost (price-per-watt) compared to competing energy sources suc...

The nanomechanical characteristics of polycarbonate (PC) polymer were investigated by atomic force microscope (AFM) and nanoindentation. Scratching, wear properties, hardness and Young’s modulus were obtained. The relationships between scribing feed and speed, surface depth and roughness and applied load were also investigated. The results indicated that as the applied load was increased, the f...

1.1 Administrative details • Instructors: Aditya Gopalan ([email protected]), Parimal Parag ([email protected]) • Teaching assistant: Raghava GD ([email protected]) • Grading policy: Homework assignments (including programming exercises): 30%, Scribing lectures: 10%, Midterm exam: 20%, Final exam: 40% • Course webpage: www.ece.iisc.ernet.in/∼parimal/estimation.html • Sc...

Solar cells are becoming a highly promising alternative energy source for various markets. In the last five years or so a tremendous amount of research effort has been put into increasing the efficiency of solar cell technology and reducing its manufacturing cost. It is believed that success in both of these areas will further propel its use in various markets. The two major structures commerci...

The performance and degree of efficiency of transformers are directly determined by the bulk magnetic properties of grain oriented electrical steel laminations. The core losses can be improved by post manufacturing methods, so-called domain refinement techniques. All these methods induce mechanical or thermal stress that refines the domain structure. The most commonly used technique is laser sc...