VLSI CHAPTER 1 TEST QUESTIONS AND
ANSWERS
Application Specific Integrated Circuit (ASIC) - ANSWER An integrated
circuit optimised for a specific application. This is in contrast to a general-
purpose integrated circuit.
Bipolar Processing - ANSWER The fabrication and interconnecting of bipolar
junction transistor devices within a circuit substrate. This is the batch
construction of junction transistors using the planar process
Boat ANSWER Wafers are carried from one process step to another in a carrier
called a boat. A boat typically holds 12-24 wafers. The wafers are held upright
with space in between to allow exposure to the chemical vapors in the chamber
in which the boat is placed.
CAD System - ANSWER Computer Aided Design System. IC CAD systems
may be automated or manually controlled. Manual IC drafting systems are
sometimes referred to as "polygon pushers". An IC CAD system typically
outputs its results onto a data base tape. The data base tapes are typically in
Calma Stream format or in CIF (Cal-Tech Intermediate) format.
Chemical Vapor Deposition - ANSWER The impurities for doping silicon in
the planar process are normally provided in vapor form and deposited on the
surface to be doped. The process is called chemical vapor deposition and is
often referred to as CVD.
Clean Room - ANSWER Most wafer processing steps are carried out in a
controlled environment area called a clean room. the environment is controlled
ANSWERS
Application Specific Integrated Circuit (ASIC) - ANSWER An integrated
circuit optimised for a specific application. This is in contrast to a general-
purpose integrated circuit.
Bipolar Processing - ANSWER The fabrication and interconnecting of bipolar
junction transistor devices within a circuit substrate. This is the batch
construction of junction transistors using the planar process
Boat ANSWER Wafers are carried from one process step to another in a carrier
called a boat. A boat typically holds 12-24 wafers. The wafers are held upright
with space in between to allow exposure to the chemical vapors in the chamber
in which the boat is placed.
CAD System - ANSWER Computer Aided Design System. IC CAD systems
may be automated or manually controlled. Manual IC drafting systems are
sometimes referred to as "polygon pushers". An IC CAD system typically
outputs its results onto a data base tape. The data base tapes are typically in
Calma Stream format or in CIF (Cal-Tech Intermediate) format.
Chemical Vapor Deposition - ANSWER The impurities for doping silicon in
the planar process are normally provided in vapor form and deposited on the
surface to be doped. The process is called chemical vapor deposition and is
often referred to as CVD.
Clean Room - ANSWER Most wafer processing steps are carried out in a
controlled environment area called a clean room. the environment is controlled
