Bell Labs researchers use miniature rubber stamps to create microscopic devices

Bell Labs researchers use miniature rubber stamps to create microscopic devices
Tom Foremski
Researchers at Lucent Technologies’ Bell Labs have developed a rubber based system that can be used to stamp sub-micron features on substrates such as glass and plastic.
The researchers have discovered a process to make reusable rubber stamps that have very small features, as small as 0.00001 inch wide, that can be used to literally stamp chips onto various materials.
The stamps are made by pouring liquid rubber onto a prototype device made of patterned silicon. The rubber solidifies and is peeled away from the silicon, creating an accurate reproduction of the microscopic silicon relief pattern.
Lucent says that the technique offers a cheap chip production process without the need for conventional lithography techniques. The process could be used to create flexible display screens and other products.


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