Which damages may occur in CSP LEDs due to the reflow soldering process ?

26 May 2024 0 8K Report

I am investigating a failure of a CSP LED that fails after placement and reflowing

Badges
Science topic

More Eyal Tamir's questions See All

How to use latitude and longitude information to assign locations to districts in Afghanistan?

Dear all, I am trying to figure out how to assign the locations of violent events, which are recorded in ICEWS, to districts in Afghanistan based on latitude and longitude information. Therefore,...

31 October 2020 9,962 4 View

Is there a scale to evaluate the quality of public transportation?

Hello everyone, I am looking for a way to measure the quality of public transportation and would love to hear you thoughts about the satisfaction with travel scale [STS] or any other common...

03 March 2020 3,484 6 View

How to measure group trust and track it over time?

As part of an intervention that aims to develop trust between members of group who work together to achieve a common goal, I'm looking for ways to measure trust and to track changes over...

10 September 2019 6,927 4 View

How to calculate (Ttop), (Tbot), and Fmax for embedded pile in Plaxis for soils : sand and clay in this 2 cases "saturated case and dry case"?

just for research

23 May 2019 3,785 2 View

Is it possible to insert PICC line to Rabbit ear?

peripherally inserted central catheter (PICC)

24 June 2018 9,521 4 View

In mice, into which tendons do the lateral and medial fabellas embed?

I am looking to know where the lateral and medial fabella (small sesamoid bones on both sides of the mice knee) are embedded in mice musculature.

10 March 2017 5,051 3 View

How much soluble sugar is in xylem sap?

What is the range of soluble sugar concentration in xylem sap of common tree species (e.g. pine, lemon; NOT sugar maple)? And how would you recommend measuring it (HPLC/ refractometry/ enzymatic/...

13 November 2016 9,779 6 View

Which method(s) would you consider reliable for measurement of xylem embolism?

e.g. on branch segments and in vivo.

27 September 2016 6,209 10 View

Are thin films of PVDF and its copolymers isotropic, anisotropic or orthotropic ?

Does any one have an idea about the material properties of the thin Films (within nm and um ranges of thickness ) of PVDF and its copolymers, such as P(VDF-TeFE), P(VDF-TrFE)56/44 mol%,...

25 February 2015 8,845 2 View

Can anyone send me the piezoelectric, the dielectric and elastic properties constants matrixes of different PVDF copolymers and the terypolymers?

Can anyone send me or tell me where i may find the piezoelectric, the dielectric and elastic properties parameters/constants matrixes of the following compositions or any other compositions of...

17 December 2014 2,800 4 View

Stability of the Solar System: Insights from Einstein’s Equations ?

The stability of the Solar System is a complex subject that blends the classical framework of Newtonian mechanics with the modern insights provided by General Relativity (GR). Understanding this...

07 August 2024 2,569 1 View

How to use Density Functional Theory to calculate carrier mobilities of solid system?

Hello, everyone. I have tried to determine carrier motilities of some materials, by Density Functional Theory, using Quantum ESPRESSO. There are a few methods to do it, like a package called...

04 August 2024 8,894 1 View

Does continues partial charging/discharging do any harm to the BESS performance and degradation?

For a grid connected BESS (lets say 100 MW/200 MWh system, LFP battery), if we charge the BESS in such a way that whenever we can access power from the solar that will charge the BESS. Hence it...

01 August 2024 9,903 7 View

Best mask design for metal deposition aiming build a Perovskite solar cell device?

What types of mask designs for metal deposition, to be used in a PVD system, are best suited for perovskite-based solar cells?

31 July 2024 4,835 3 View

Which filtration method to go for run off water from dirty solar panels to be used again?

We are working on a robot that cleans solar panels using fresh water supply and a rotating brush. We are trying to conserve as much water at possible by recycling the dirty water that is collected...

28 July 2024 5,778 2 View

How to conduct a sensitivity power analysis for Kendall's Tau?

Is there a straightforward way to conduct a sensitivity power analysis for a Kendall's Tau correlation? I was considering using the sensitivity setting and "Correlation: point biserial model" test...

28 July 2024 6,133 8 View

Terrorism, a natural inclination of all animal species?

There are many types of symbolic judgements. For example, when an Israeli pilot flattens the home of a Palestinian family (even if they are forewarned), it is natural for them to experience shock...

28 July 2024 2,610 1 View

Is it feasible to employ an artificial sun in the experimental investigation of concentrated solar power systems, specifically linear Fresnel systems?

Is it feasible to employ an artificial sun in the experimental investigation of concentrated solar energy systems, specifically linear Fresnel systems? If the answer is affirmative, what type of...

22 July 2024 9,710 6 View

I am working on III-V based tandem solar cells.Can anyone explain that solar cells work under forward or reverse biased conditions?

I want to know that n-doped side of solar cell is connected with positive or negative electrode.

20 July 2024 1,348 2 View

How can I calculate minimal sample size using G Power?

I am conducting a study aimed at exploring the correlation between introversion and social phobia among Lebanese adults. I need to calculate the minimal sample size using G Power, but I'm not sure...

19 July 2024 6,048 1 View