Production of Semiconductors (Leaving Cert Engineering): Flashcards

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Production of Semiconductors
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Semiconductor production creates

Electronic components with billions of transistors & parts

Silicon wafer definition

Thin, flat disc foundation for building circuits

Ingot in semiconductor production

Large cylindrical block of pure silicon

Photolithography definition

Transfers circuit designs onto wafer using light & masks

Photomask purpose

Stencil for circuit design pattern transfer to wafer

Etching purpose

Selectively removes unwanted material from wafer surface

Plasma vs wet etching precision

Plasma: <10<10 nm features; Wet: struggles <100<100 nm

Thin-film process purpose

Deposits materials at atomic/molecular level for electrical properties

Three CVD types

Thermal, Plasma-enhanced, Optical CVD

Ion implantation purpose

Introduces atoms to give desired electrical properties

Metal interconnect process creates

Electrical pathways connecting circuit elements

Yield in semiconductor production

Percentage of functional chips produced from each wafer

EDS (Electrical Die Sorting) purpose

Tests each chip electrically before packaging

3 packaging functions

Electrical connections, physical protection, thermal mgmt

EUV lithography

Extreme Ultraviolet lithography for higher circuit density

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