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Dear all, Can someone from this forum provide me the value for acoustic impedance for silver-glue? Would appreciate it someone can help. Some people called it as silver paste or silver epoxy. Thank you.
I am looking for a electrically conductive epoxy that can provide good contact for a Silicon chip gold-metalized backside at 10 GHz, for a month or two. Then I would want to disolve the epoxy (alcohol, acetone, etc) easily, or just peal off the chip mechanically, and allow the chip to be removed and reinstalled in a final circuit without damaging
I have heard this stuff is very thermally conductive. I have used other silver epoxies on alumina with but not to 20 GHz. There was a silver epoxy that had long term failure (about 3-5 years) in conductivity so be sure to get that data from the manufacturer.
silver epoxy can be used
There are a couple of ways to fill vias and make them airtight. You should discuss it with your board fab. One way is to fill the via with silver epoxy. This is one way vias are filled under at BGA with via-in-pad, for example. But it also works for vacuum filling. It can be expensive depending on your fab. For fills to which you will solde
I'm designing a 2-18 GHz coupler which requires gross leak to mil standards. I have a body and a cover fabricated out of 6061T6 aluminum - and flange mounted connectors... what is the best way to seal up this body. You do not specify the leakage level. Good commercial couplers are sealed by machining a notc
Those are nano particles sure enough, if they go through filter paper! This project is interesting, because there is nothing else like the conductive silver pen, and conductive silver epoxy. But they each cost a bunch. Excellent for repairing traces, attaching wires to headphone transducers, photovoltaic cells. Any surface that can't be (...)
Hi, This is Susie from Depot company. Depot is a professional company specializing in PCB, FPC and PCBA in China. I think, we can offer your this kind of product. Rigid PCB Layers: 1-24 Surface Finish: Hot Air Leveling, Immersion Gold, Immersion silver, Immersion Tin, Gold plating, O.S.P./Entek, Lead-free Hot Air Leveling, Peel
i found a set of liquids that can moleculary plate 24 crt gold or 100 % pure silver safely onto any metal even steel and aluminium copper etc any metal on the shopping channel on tv i will look for it again and post the name and company but it wont be hard to find on the net i like this idea as it isnt electro plating so is mutc
anybody has experience on finishing-plating microstrip circuits?. I have read that in electronics is usual the hasl finising and also an organic finishing called osp. other alternatives such as inmersion gold, inmersion silver and NiAu plating are commented. can somebody in a simple way describe advantages and drawbacks?. soldering is a require
Hi What is the design rules for silver through hole pcb designing?.From where i can get the design guidelines?. Thanks Amjad
Can anyone supply me the properties of any epoxy (used in PCB boards) material for MWS? thank you very much
See the pic below. Is the sealant of the elements called epoxy resin sealant ? Is it called EMC?
Hi, the thermal resistance increase with about 15% for a silver heatsink, compared to a black anodized one. If the heatsink is mounted horistontally instead of vertically the K factor decrease by another 15-20%. /Froggy
hello all, what I can use to adhere a chip without its package (just the die) to a normal cupper PCB ?? The material should be conductive or must have other properties to avoid ESD ? silver filled epoxy is what I called for on a sensor board I did a few years ago. The die mounted to a die mounting pad on the board that h
To simulate you first have to set up the substrate layers as following: for example using a PET dielectric and silver cond. FreeSpace//////// er=1 Boundary Open PET/////////////// er=2.9 Thickness=50um FreeSpace_0//// er=1 Boundary Open The draw the antenna. Set two ports. One of them port type internal and to have 50o
Colleagues, I?m looking for an epoxy loaded with ferrite powder. Something that could be cast, molded or overmolded. I realize that such material would have a fairly low permeability compared to the standard solid ferrite, but high permeability is not required in my application. I normally use pot cores, but there are no small enough pot core
We have a collection of target assemblies that are used to validate our computational software. A few assemblies consist of rectangular and cylindrical microwave resonant cavities (which are basically implemented as just terminated copper tubes and boxes with sma connectors). We had a somewhat unusual idea to use these same microwave assemblies for
Thanks for that advice but I have tried a slightly different way. The pin broke off inside the base glass in a little hole. I couldn't get to the pin to solder so I have filled the hole with silver paint and epoxied a new pin in. The lead appears to be in good contact with the end of the wire so I hope it will work swingbyte
Die-chip and conductive glues and/or epoxy: Does anybody here are using DIEMAT? or TANAKA? epoxy to glues microwave FET or MMIC to the carrier? Does anybody has practical experience to share with me? Especially about the difference vs market leader EpoTek? or Stycast?
Hi, enjoyed the detailed explanation above on brazing. I have a question going in the reverse direction. How do you unsolder or unbraze a silver-soldered joint between stainless steel and brass without destroying optical components housed within?
Hi, enjoyed the detailed explanation above on brazing. I have a question going in the reverse direction. How do you unsolder or unbraze a silver-soldered joint between stainless steel and brass without destroying optical components housed within?
you can also use silver and carbon conductive inks in your design application is done using screen printing
Hi, I need design equation for Inter digital capacitor, to be designed in epoxy substrate, for my project... If anyone has the equtaion or know where to get it, pls help me.. Thank you in advance
Hi, I need design equation for Inter digital capacitor, to be designed in epoxy substrate, for my project... If anyone has the equtaion or know where to get it, pls help me.. Thank you in advance
You don't plug using solder mask. You plug your vias shut with various conductive materials (silver, specially formulated paste, etc.)...but not epoxy. Plugging your vias (with conductive material) will allow for better connectivity, and the holes will be free of corrosion over time. Tenting (plugging with solder resist) helps to assembl
Dear All, I am going to fabricate a PCB for microstrip antennaa. However, I have a question: "how to fabricate a PCB by using a FR4 epoxy double copper sides board ?" Regards, kwokhinglai
Strange Question: Does anyone have experience on removing the white epoxy legend ink from PCBs? I have a customer who wants to remove some of the markings.
plzz is there anybody tht can provide me with the below artile or any other article tht gives the dielectric properties of epoxy- aluminum mixture at frequencies between 1-10 GHz. the article: "Dielectric permittivity and loss of an aluminum-filled epoxy resin" Author(s) National tech. univ. Athens, chemical eng. dep., mater
This is colloidal silver generator. I have designed. It's Sprint layout file. layout file viewer
hi, our RF CAVITY FILTER (MATERIAL : ALUMINIUM) plated with COPPER followed by silver (AG7) PLATING is passing the IMD TEST. (Filter made of Aluminium coated with Copper followed by silver (Ag7) plating is passing the IMD but RF CAVITY FILTER (MATERIAL : ALUMINIUM) plated with NICKEL followed by silver Plating is NOT PASSING (...)
I was wondering if anyone knew about a circuit to generate coloidal silver. I know it is asy to generate it but haven't found a really nice circuit. For example some sites advise to reverse the positiv and negative terminals every now and then, and would be nice to have some kind of meter to know the current going trough the probes and maye a ppm m
The silver component is most likely a crystal. Considering the package, I would guess a low frequency tuning fork type. stefannm
hi every body i want to analyse an antenna using hfss 12. the problem is i want to use fr4-epoxy instead of rt-duriod but all the frequencies and other damn things chang. would any one help me to chang my antenna to get the same result as i got using rt-duroid?
I have some parts that came with screen printed electrodes, over time the electrodes have worn off and now I can't solder leads to the parts at all. I have tried using rosin flux and acid flux to solder the leads back on. I have tried putting on new electrodes with a silver paint and a nickel pen but they just melt into the solder. I have tried glu
hello i read in a paper the Damping coefficient of silver is about 8.5e13 S^-1 what does its unit( S^-1) meaning? thanks
In this series of laptops, the Nvidia GPU fails due to overheating (bad thermal design). It needs a reflow of the chip and a small modification - replacing the thermal pad between GPU and heatsink with a copper piece 2mm thick. Also good quality thermal paste is to be used (like Arctic silver). Apply this paste (small quantity) on the GPU and place
Anyone know the dielectric constant of cured 5 minute epoxy? I need to dielectrically load some waveguide choke joint channels for a quick experiment, and don't feel like blowing $300 for some Eccostock.
Like casted IC ---------- Post added at 04:22 ---------- Previous post was at 04:18 ---------- Moisture resistance, high temp for reflow ovens, etc.
Hello, I suggest the LPF with - pass Band Frequency about 10MHz - filter type LC Butterworth, 9th order - pass power 80W (Vpp 50V) As inductor use iron powder toroid core T130 with material 2 (Red/Clear) or 6 (Yellow/white) The question is what to use capacitors? The ideal would be silver mica, but they are poorly accessible and very expe
I'm trying to implement a PML for a 1d simulation domain of silver (1d code for testing purpose), which is modeled as a drude model. I've used the PML for dispersive media as introduced in Gedney's paper, where you introduce a P term and insert the sigma from silver as eps_r(w). And for PML, i just used the basic formula from Taflove's book with an
For those interested in the link to the whole article: Reactive silver Inks for Patterning High-Conductivity Features at Mild Temperatures - Journal of the American Chemical Society (ACS Publications) Single copies are expensive for non-members of ACS, but the abstract available on that site pr
Check the datasheet ---------- Post added at 20:57 ---------- Previous post was at 20:53 ---------- For Tsop4838 FEATURES ? Low supply current ? Photo detector and preamplifier in one pa
silver solder that evaporates or is epoxy with >99% silver content is $$$ but can be painted on. Hobby shops have nail brush applicator for simple fixes. but 30AWG magnet wire or WW wire is trade solution for jumpers. What is it for?
I see. But in this case, what you mean for the 1st one is that, looking at the specification, we consider this inductor as a choke inductor that is able to suppress all the high frequency interference starting from 7.96MHz? About the 4th one, drum choke, is for the same purpose? What are the difference between them? When one is used and when
Greetings How much reliability can i expect from silver fingers instead of gold ones. Do they last for 5, 10, 15 insertions or are there odds that they'll break right away.
After a bit of research I have found that epoxy coating systems are a common in marine boating. They come as a two part paint and hence will flow much more readily than araldite glue. And it seems I might be able to get them in quantities as small as 500ml (250ml + 250ml) to try out. And there is a retail boating store not far from me.
hiii. what i use with silver nitrate to plating copper with silver
To anchor wire to non-solderable surfaces: There is the conductive pen which applies a silvery liquid. It conducts electricity when dry. Also conductive epoxy.
epoxy, commonly used in electronics and electrical systems, is the basic component of polyepoxides. It is a very important component in many kinds of work in this field, such as building motors, generators, transformers, insulators and many others. Electrical insulation ensured by epoxy prevents from short circuits and also protects the electrical