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Deterministic multi-layer micro-scale assembly of SU-8 polymer objects as well as the cohesively joined SU-8 interface strength have been investigated. The process of SU-8 photoresist (PR) into retrievable individual micro-scale objects format called “ink” is reviewed and the construction of three-dimensional (3D) unique micro-structures via micro-Lego, which refers to the transfer printing of the...
A nanobeam photonic crystal cavity made with InGaAsP quantum well and Si waveguide is integrated on SiO2/Si substrate via transfer printing. The light emitted from the nanobeam showed coupling to waveguide. We demonstrated novel way to integrate III-V devices on Si based photonic integrated circuits.
A metamaterial transfer printing method done by adhesion switching of viscoelastic stamp is presented. 3-D stack of heterogeneous material can be built at a desired position regardless of target substrate even on cheese.
Metal-Semiconductor-Metal structured germanium photodetector is fabricated coupled with silicon waveguide on flexible substrate. Unique nanomembrane transfer printing method for low temperature process and high quality crystalline condition is used for stacking silicon and germanium layers. Optical measurement shows that its dark/photo current characteristics and quantum efficiency of 1.52 um laser...
This paper presents the fabrication of the Si/GaInP heterojunction photodetectors using transfer printing of silicon nanomembranes (SiNMs). Doped SiNM was transferred to a GaInP/GaAs substrate using a polydimethylsiloxane (PDMS) stamp. An adhesion interfacial layer was used to bond the two materials together. The heterogeneous integration of Si, GaInP, and GaAs layers formed a P-I-N structure for...
We report here high-performance broadband membrane reflectors based on crystalline silicon nanomembrane photonic crystals. A modified polydimethylsiloxane stamp transfer technique is developed for transferring large-area silicon membranes to glass substrates. Polarization-independent broad reflectivity at 1550-nm wavelength band was obtained from Si membrane reflectors, on both silicon and glass substrates...
Recently there are growing interests in reliable and economical processes for the printed electronics fabrication. In this article we present a new direct metal patterning method by two-step transfer printing process of conductive metal nano-ink solution. This fabrication process consists mainly of two steps: (1) transfer of metal nano-ink solution from the ink-substrate to the polymer stamp, and...
A novel inorganic quantum dot based light emitting diode is fabricated by microcontact printing of a well defined-geometry of CdSe/ZnS nanoparticles films onto p type silicon substrate that acts as the hole transporting layer.
This paper presents the electro-luminescence (EL) display lamp which is patterned on a curved surface by the pad printing method. The EL display lamp consists of 5 layers: bottom electrode; dielectric layer; phosphor; transparent electrode; bus electrode. For proper pad printing, the ink of each layer was formulated and the pad printing condition was controlled. A PEN film was used first in order...
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