According to Dr Michael Kraft at the University's School of Electronics & Computer Science (ECS), the major challenge when stacking silicon wafers is to align one wafer to another, matching all the features.
'The alignment needs to be accurate,' commented Dr Kraft. 'At the moment, big chunky machines are being used and the process is being carried out optically. The optical path is long and this introduces errors.'
Dr Kraft and his colleague, Professor Mark Spearing at the School of Engineering Sciences, worked with Dr Liudi Jiang, who is now a Roberts Fellow in the School of Engineering Sciences, to develop what they describe as 'an effective passive alignment technique for the achievement of nanoprecision alignment'.
The approach adopted by the researchers means that the alignment features consisting of convex pyramids and concave pits can be fabricated and chip scale specimens can be successfully bonded after the microfabrication process. An alignment precision of 200 nanometres has been achieved.
'We have demonstrated that we do not need expensive machines to create alignment,' said Dr Kraft. 'Our system will automatically fit the wafers together like Lego.'
The researchers are in the process of submitting a proposal to the Engineering and Physical Sciences Research Council (EPSRC) to enable them to develop their work in this field further.
Helene Murphy | alfa
Fraunhofer FIT joins Facebook's Telecom Infra Project
25.10.2016 | Fraunhofer-Institut für Angewandte Informationstechnik FIT
Stanford researchers create new special-purpose computer that may someday save us billions
21.10.2016 | Stanford University
Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.
This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...
Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion
Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
25.10.2016 | Earth Sciences
25.10.2016 | Power and Electrical Engineering
25.10.2016 | Process Engineering