https://forum.microwaves101.com/categories/17/packaging-and-materials/feed.rss Sun, 18 Oct 2026 03:03:02 Z Packaging and Materials - Microwaves 101 Discussion Board en https://forum.microwaves101.com/discussion/165/plating-on-3d-printed-abs-resins Tue, 25 Jul 2023 07:07:47 Z Tinus Stander 165@/discussions Hi everyone Anyone here have any experience with plating 3D printed ABS resins? We have a little Form3 downstairs we'd like to print some waveguide parts on, but we need a way to deposit a conductive seed layer prior to copper electroplating. We tried going the conventional ABS plating route, but... https://forum.microwaves101.com/discussion/205/sic-heat-spreaders Thu, 04 May 2023 01:16:54 Z UnknownEditor 205@/discussions Does anyone know where to go to have SiC wafers ground to a particular thickness, for use as heat spreaders? Happy New Year, Steve https://forum.microwaves101.com/discussion/191/absorber-and-getter-in-the-same-module Mon, 30 May 2022 17:01:25 Z UnknownEditor 191@/discussions Suppose you made a hybrid module that included hydrogen/H2O getter on the lid... but then felt the need to attach RF absorber to the lid, on top of the getter... would that prevent the getter from working? Steve https://forum.microwaves101.com/discussion/157/silver-plated-brass-screws-for-tuning Tue, 23 Feb 2021 20:25:29 Z Jim Hill 157@/discussions Have an application where a diplexer would like to have silver plated screws. Preferably brass screws plated with silver; as SS and steel alloys have nickel in them that will affect the signal. Purchasing scres and then silver plating will also affect the thread and make it difficult to get the... https://forum.microwaves101.com/discussion/121/surface-roughness-and-phase-delay Sat, 20 Jun 2020 18:44:46 Z Tinus Stander 121@/discussions Thanks for the handy calculator for surface roughness! Something that the page doesn't mention, is that surface roughness not only increases attenuation, but also slows down wave propagation. This is also a contributing factor to the discrepancy between material DK and design DK (along with... https://forum.microwaves101.com/discussion/120/bridgewave-micro-coax Thu, 11 Jun 2020 16:53:24 Z UnknownEditor 120@/discussions Does anyone know whatever happened with this technology for making coaxial wirebonds? http://processsolutionsconsulting.com/pdf/Reliability/Cahill_IMAPS2006_paper.pdf It seemed like such a great idea... https://forum.microwaves101.com/discussion/83/permittivity-and-loss-tangent-of-polymers Sat, 26 Oct 2019 17:43:17 Z Curtis Belknap 83@/discussions Does anyone have (or know where to find) data on permittivity and loss tangents for: Polycarbonate Polystyrene Polypropylene at or about 60? https://forum.microwaves101.com/discussion/89/max-power-dissipation-per-unit-area-of-thin-film-materials Sun, 08 Sep 2019 02:12:06 Z TomR 89@/discussions Hello, I'm familiar with the standard rule of thumb where the max. power dissipation per unit area of thin film resist allowed on alumina is 500W/in^2. How about for other materials like alumina nitride and fused silica. I strongly suspect this is a function of thermal conductivity of the base... https://forum.microwaves101.com/discussion/63/complex-relative-permeability-of-nickel-at-high-frequencies Sat, 24 Nov 2018 15:53:24 Z Maphyhd 63@/discussions What is the value of the complex relative permeability of nickel at optical frequencies? does it tend to 1 ? https://forum.microwaves101.com/discussion/44/coax-to-pwb-vertical-connection Wed, 01 Aug 2018 19:43:49 Z UnknownEditor 44@/discussions Does anyone have an example of microstrip (or CPWG) transition to coax in a PWB stack, for example, to feed a patch element? Looking for artwork that shows via diameter (center conductor and grounds), catch pads, etc that is manufacturable and is already set up for 50 ohms up into K-band. FR4...