David Czerski

9 Questions 15 Answers 0 Followers

Questions related from David Czerski

What may be a typical level of Carbon observed on a sputtering target of Galfenol, Iron-Gallium?

I had a Galfenol (Fe:Ga, 81:19 %at.) target made for sputtering, when I received the target I sent it for an EDX analysis and the results came back as Fe:Ga:C (60:11:29 %at) I am curious about...

21 May 2019 6,394 2 View

Is the smoothness/roughness of sputtering targets an important factor for deposition with regards to contamination?

I am curious if the surface roughness of a target is considered an important factor for sputter deposition, because if my target is rough I think there is a higher chance of contaminants becoming...

15 May 2019 5,812 5 View

What may be the causes of carbon contamination during the sputtering process?

I have been sputtering an alloy of Fe Ga, when I get the EDX results of my film back there is a larger percentage of C present in the results, which is unexpected. I did notice that as the film...

29 March 2019 2,509 13 View

How is SAW device design and optimisation achieved for power transfer, before adding a matching network?

There are a number of parameters for SAW design that will affect the impedance and matching of the device to the power source. I would like to get a better understanding of how these work and...

14 January 2019 7,855 0 View

What is the Capacitance/Pair Value for 128 YX LinbO3 and how is it determined?

I am looking at SAW devices on LINbO3 and I have come across this term in my searches but usually only for YZ and I think YX LiNbO3 but not typically the rotated cuts. I am hoping someone could...

11 January 2019 4,031 0 View

Have single crystal piezoelectric materials been used with magnetostrictive materials for the magnetoelectric effect?

I have mostly seen composites made of piezoelectric ceramics layered with magnetostrictive alloys for the demonstration of the magneto-electric effect. My understanding is that piezoceramics are...

31 August 2018 4,475 5 View

What are the lower limits of a SAW device?

Typically the lowest frequencies I have come across for SAW devices operated at is 20MHz. I have come across suggested ranges for surface wave devices starting as low as 1MHz. I know that at...

29 August 2018 7,354 1 View

Do surface acoustic wave devices' sensitivity dependent on the frequency?

I am wondering if lower frequency SAW devices are less sensitive to changes to their acoustic wave path then higher frequency devices? My thinking is as lower frequency devices have larger...

23 July 2018 4,187 10 View

RF Sputtering Of FeGa (Galfenol), plasma forms but no material depositon, why?

I am trying to rf sputter FeGa, onto glass slides and have made a number of attempts, with no film forming. I have adjusted the power between 80W to 150W , adjusted the distance of the target to...

12 January 2017 2,040 13 View