O/e-MCM packaging with new, patternable dielectric and optical materials

Abstract

This paper presents a novel ole-MCM-LID-concept for fully integrated opto-electronic MCM-packaging aiming at: very low cost, very high interconnect density and high performance. The polymer thin film materials technology allowing the integration of optical waveguides and high density electrical interconnects in just 3 thin film layers is also discussed in terms of chemistry, processes and properties. Very good processability and planarization of the new inorganic-organic photo-polymers, ORMOCERs, (ORganically Modified CERamics) in combination with a much lower post-curing temperature (120 "C -170 "C) than alternative materials (such as polyimide and benzocyclobutene) enables the use of low cost polymer substrates such as FR-4 epoxy.Novel surface mountable waveguide-connectors for passive precision alignment, compatible with standard MTopto-connectors can be used for coupling light in and out from the ole-MCM-LID'S. In the demonstrator, laser-arrays (VCSEL's) and photodiode-arrays are flip-chip mounted above UV-excimer laser ablated 45-degree mirrors in the waveguides. Driver-chips and passive components are wirebonded and surface mounted respectively.The modules are also supplied with microvias in the FR4epoxy-substrate connecting to a ball grid array (BGA) underneath. The need of any extra package for connection to next packaging level is thus eliminated. In conclusion the versatility and the low-cost potential of the presented technologies are emphasized.

Electrical behavior of PET films coated with nanostructured organic–inorganic hybrids

“…4): this increase is restricted in the industrial range of frequency but becomes relevant at frequencies below 10 Hz. Even though the a.c. characterization of the coatings alone has not been performed in the present article, dielectrical characterizations carried out on coatings of similar composition17, 27 provided ε′ data around 3.5–4.0, at frequencies between 1 and 10 kHz, which is probably quite consistent with our results in the same frequency range. From the loss factor data (Fig.…”

Structural characterisation of a sol-gel copolymer synthesised from aliphatic and aromatic alkoxysilanes using 29Si-NMR spectroscopy

“…The flexibility of the approach, resulting from the large variety of available precursors and low synthesis temperature, offers the potential molecular engineering of both composition and properties for a wide range of solid materials. For optical applications, organic/inorganic hybrid materials have gained increased importance over the last decade, mainly due to their simplicity of preparation in the fabrication of photonic devices for the second and third telecommunication windows, located respectively at 1310 and 1550 nm [5][6][7][8][9]. However, the main factor limiting the development of such devices has been high propagation losses caused by absorption and scattering effects within the material.…”

Porous inorganic–organic hybrid material by oxygen plasma treatment

“…ORMOCERs have mostly been used as coating material [20], and in optical [21] and micro electronic applications [22]. In our own studies, we have also demonstrated the use of ORMOCOMP, a commercially available inorganicorganic hybrid polymer, as non-reflecting surfaces [23], as well as in different kinds of microfluidic applications such as in microchip capillary electrophoresis [24], surfaceassisted laser desorption ionization (SALDI) plates [25] and as oleophobic/oleophilic surface for adhesive self-assembly [26].…”