- published: 23 Feb 2016
- views: 6855
In semiconductor fabrication, a resist is a thin layer used to transfer a circuit pattern to the semiconductor substrate which it is deposited upon. A resist can be patterned via lithography to form a (sub)micrometer-scale, temporary mask that protects selected areas of the underlying substrate during subsequent processing steps. The material used to prepare said thin layer is typically a viscous solution. Resists are generally proprietary mixtures of a polymer or its precursor and other small molecules (e.g. photoacid generators) that have been specially formulated for a given lithography technology. Resists used during photolithography are called photoresists.
Semiconductor devices (as of 2005) are built by depositing and patterning many thin layers. The patterning steps, or lithography, define the function of the device and the density of its components.
For example, in the interconnect layers of a modern microprocessor, a conductive material (copper or aluminum) is inlaid in an electrically insulating matrix (typically fluorinated silicon dioxide or another low-k dielectric). The metal patterns define multiple electrical circuits that are used to connect the microchip's transistors to one another and ultimately to external devices via the chip's pins.
music - Lorenzo
lyrics - Tecchio
Defeat our purpose
But just which fate is worse?
chorus:
How long can we go on?
We cannot sell ourselves
We'll take it on our terms
No easy path to resist success
You sell out, cash flows in
Your sickly glitter grin
chorus
You've only got one chance
To take it all the way
Relax, don't go so fast
Why get so carried away?
Resist, now don't tell me what to do
Success, I'll never ever leave it up to you
solo - Dan
solo - Scott
We may not change the world
Who said we wanted to?
Don't curse in ignorance
Fearful of something new
Oh, open up your mind
Success is self-defined
Do what your heart commands
Despite what they demand
Resist Success
Resist Success
Don't stay within their lines
Don't scramble for the dollar signs
They'll find you if you're deserving
If your course is unswerving
Outweigh the possibility
Of market stability
You are the path to resist success