Manufacturing & Prototyping

Microfabrication of a High-Throughput Nanochannel Delivery/Filtration System

A microfabrication process is proposed to produce a nanopore membrane for continuous passive drug release to maintain constant drug concentrations in the patient’s blood throughout the delivery period. Based on silicon microfabrication technology, the dimensions of the nanochannel area, as well as microchannel area, can be precisely controlled, thus providing a steady, constant drug release rate within an extended time period. The multilayered nanochannel structures extend the limit of release rate range of a single-layer nanochannel system, and allow a wide range of pre-defined porosity to achieve any arbitrary drug release rate using any preferred nanochannel size. This membrane system could also be applied to molecular filtration or isolation. In this case, the nanochannel length can be reduced to the nanofabrication limit, i.e., 10s of nm.

Posted in: Manufacturing & Prototyping, Briefs

Read More >>

Versatile, Ceramic, Metering Pumps for Medical Applications

Valveless design and sapphire-hard internals provide drift-free accuracy without recalibration for millions of maintenance-free dispenses.From R&D in the laboratory to production process control, from disposable component assembly to OEM diagnostic instrumentation, a broad array of medical and medical support applications rely on precise dispensing or metering of fluids. But just as diverse as the applications are the varieties of fluids, their chemical and physical characteristics, and the specific application parameters. It could then be concluded that fluid control components, including pumps, need to have the flexibility to handle many different fluids and applications.

Posted in: Bio-Medical, Manufacturing & Prototyping, Medical, Drug Delivery & Fluid Handling, Briefs, MDB

Read More >>

Technique for Configuring an Actively Cooled Thermal Shield in a Flight System

New shields could potentially provide considerable mass savings.Broad area cooling shields are a massefficient alternative to conductively cooled thermal radiation shielding. The shield would actively intercept a large portion of incident thermal radiation and transport the heat away using cryogenic helium gas. The design concept consists of a conductive and conformable surface that maximizes heat transfer and formability.

Posted in: Manufacturing & Prototyping, Briefs, TSP

Read More >>

Pallet Manufacturing Process and Machinery Using Recycled Plastic Materials

A process and device enable plastic lumber to be joined together to form pallets.As the recycling of plastic continues in the United States, there is a great need for the increased utilization of recycled products. Some of the plastic being recycled is extruded into a product known as plastic lumber, which is similar in shape and texture to its wood counterpart. Recycled plastic lumber offers many of the same features as wood with several benefits.

Posted in: Manufacturing & Prototyping, Briefs

Read More >>

Measuring the In-Process Figure, Final Prescription, and System Alignment of Large Optics and Segmented Mirrors Using Lidar Metrology

This technique has application in commercial optics and lithography. The fabrication of large optics is traditionally a slow process, and fabrication capability is often limited by measurement capability. While techniques exist to measure mirror figure with nanometer precision, measurements of largemirror prescription are typically limited to submillimeter accuracy. Using a lidar instrument enables one to measure the optical surface rough figure and prescription in virtually all phases of fabrication without moving the mirror from its polishing setup. This technology improves the uncertainty of mirror prescription measurement to the micronregime. Furthermore, during instrument assembly, a lidar instrument measures the fabricated optical surface directly and compares with scans of diffuse, mechanical surfaces or other coordinate system references on metering structures. This speeds the alignment process and removes the necessity of ancillary alignment fiducials because the optical surface can be sampled directly.

Posted in: Manufacturing & Prototyping, Briefs, TSP

Read More >>

Silicon Carbide Mounts for Fabry-Perot Interferometers

Etalon mounts for tunable Fabry-Perot interferometers can now be fabricated from reaction-bonded silicon carbide structural components. These mounts are rigid, lightweight, and thermally stable. The fabrication of these mounts involves the exploitation of post-casting capabilities that (1) enable creation of monolithic structures having reduced (in comparison with prior such structures) degrees of material inhomogeneity and (2) reduce the need for fastening hardware and accommodations. Such silicon carbide mounts could be used to make lightweight Fabry-Perot interferometers or could be modified for use as general lightweight optical mounts.

Posted in: Manufacturing & Prototyping, Briefs

Read More >>

Metallization for Yb14MnSb11-Based Thermoelectric Materials

Process enables device fabrication using advanced, high-temperature thermoelectric material.Thermoelectric materials provide a means for converting heat into electrical power using a fully solid-state device. Power-generating devices (which include individual couples as well as multi-couple modules) require the use of n-type and p-type thermoelectric materials, typically comprising highly doped narrow band-gap semiconductors which are connected to a heat collector and electrodes.

Posted in: Manufacturing & Prototyping, Briefs, TSP

Read More >>

White Papers

Finding the Right Manufacturer for Your Design
Sponsored by Sunstone Circuits
Measurement of Harmonics using Spectrum Analyzers
Sponsored by Rohde and Schwarz A and D
The True Cost of Bearing Lubrication
Sponsored by igus
Guidelines for Ensuring PCB Manufacturability
Sponsored by Sunstone Circuits
Maintenance Free Linear Guides
Sponsored by IKO
9 Questions to Ask when Specifying a Slewing Ring Bearing
Sponsored by Kaydon

White Papers Sponsored By: