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The first integrated circuit masks were hand made, then optically reduced. The wafers were then processed much as they are today using these reduced masks.
Hand made masks were used well into the 1970s. All the early microprocessors were done with hand made masks. You can even download from Intel's website now masks and schematics, all hand drawn, for their original 4004.
What else can I help you with?
How long did it take to build the steam engine?
i dont now
Why is micro-controller called as micro-controller?
It is called a microprocessor because it is the single microchip integrated circuit processor of a microcomputer. The term minicomputer was already taken and referred to small computers whose processor was built of many different microchip integrated circuits. There was never anything called a "miniprocessor" in these computers, just as there was never anything called a "mainframe processor" in the big computers.Note: Some early microprocessors were not single microchips, but were instead a family of related microchips that could be interconnected in a variety of different ways (e.g. AMD 2900 family). This served two functions:it avoided the limits of the number of transistors that could be put on a single microchip with the technology available thenproviding greater design flexibility (e.g. the same microprocessor family could be used to build microcomputers having very different word lengths depending on the requirements: 16 bit, 32 bit, 48 bit, 64 bit, etc.)You do not see this anymore, all microprocessors now are single microchip integrated circuits.
What are examples of six simple machine?
Lever Pulley WedgeWheel and axle Inclined planeScrew And you now know know the six Simple Machines!!!
What technologies were invented during 1940-1969?
By the 1940s, the automobile and the telephone. Washing machines now had timers on them. There were now also electric dryers. People could choose between an electric stove or a gas stove.
What are the 5 products of science and technology?
5 Examples of Technology You Can Use Now Smartphones Automatic lights Activity and health monitoring Tablet computers Automated cabinets
Where can you learn how to build ships as they were built in the 20th Century?
How ships are built now a days...?
How did the life of early Adventist preachers differ from that of Adventist ministers today?
they have churches now built for them and dont have to build the church them self and they now get paid
Where did France build it's first North American settlements?
France built it's first North American settlement in what is now Florida.
How much did it cost to build the titanic and how much would it cost now?
In 1912, Titanic was built for $7.5M which would be about $400M today.
When was Build Now created?
Build Now was created in 2008.
What did china build so many years ago to protect its boarders?
china built a wall. It's now called the Great Wall of China
Fingerprints are used to identyfy humans can nose prints identyfy dogs?
No. Why would we use nose prints when we now have microchips to locate our lost animals?
How is bubble gum made by machines or hands?
At first I bet bubble gum was made by hand, but now it is made by machines At first I bet bubble gum was made by hand, but now it is made by machines
Why was chelmsford built where it is now?
there was a bishop who built it
What simple machines were used to build the great wall of china?
Simple Machines allowed the builders of the Great Wall of China to build more quickly and efficiently. Machines such as levers and inclined planes allowed the amount of energy spent to do the work to be decreased. Other machines such as pulleys allowed objects to be transported up and down the wall with greater ease. Wedges were incorporated in the hammers that the Chinese used to pound the earth and all the materials of the Wall together.
When was the Chattanooga Choo Choo hotel build?
The Chattanooga Choo Choo hotel was built in the mid ninteen hundreds around 1955. It was built to house only about 5 people but obviously grew to house about 50 people now.
How do you build a earthworm farm?
put a worm on a rock and cover it with a leaf
