Sample interview questions: Can you explain the concept of laser-induced forward transfer and its significance in printing?
Sample answer:
Laser-Induced Forward Transfer (LIFT)
LIFT is a laser-based printing technique that enables the precise transfer of materials from a donor substrate to a receiver substrate. The process involves focusing a pulsed laser beam onto a thin film material deposited on the donor substrate.
Mechanism:
- Laser irradiation melts or ablates a small region of the film, forming a vaporized material with high kinetic energy.
- The vaporized material is ejected towards the receiver substrate, carrying a portion of the target material along with it.
- Upon impact with the receiver substrate, the material adheres to its surface, forming a patterned deposit.
Significance in Printing:
LIFT offers several advantages for printing applications:
- High Resolution: Sub-micron features can be printed with precision, making it suitable for microelectronics and other high-resolution applications.
- Versatile Materials: LIFT can transfer a wide range of materials, including metal… Read full answer