r/MEMS

Greetings Everyone I am new to this Subreddit I am a final year Computer Engineering Student who is an aspiring Biomedical Engineer. In my undergrad I took electronic courses like Digital Electronics, A bit of Analog Electronics, I know basic knowledge of CMOS and Transistor (I am studying this again during this summer Vacation) and I also took a course on FPGA Programming with Verilog. I want to get started with MEMS so can anyone suggest me a roadmap like what books to read ? What Softwares to use ? And How can I make a Portfolio?

Thank You Looking forward to read all your lovely replies

Does anyone know where to buy ANALOG MEMS gyro breakout boards? It seems that any board made by Sparkfun or similar manufactures are now discontinued. I cannot find a single analog MEMS gyro breakout board for sale anywhere. There are plenty of 6 or 9 DOF IMU setups out there, as well as stand alone digital MEMS gyros.

The reason analog is needed is for use in an undergraduate engineering teaching lab where dSPACE systems are used to read analog sensors for which analog accelerometers are still plentiful and can be easily sourced. We are on our last set of analog gyros with no replacements going into next year - anyone who has worked in a teaching lab knows that is dangerous as students are very capable of frying sensors and spares are needed.

We have a digital sensor lab at the end of the course using RPi which is good initial exposure for the students, but we would still like to keep the analog gyro lab in rotation if possible.

If these sensors are truly not made anymore in a breakout board format, does anyone have any insight as to why analog MEMS gyros have seemingly fallen off the face of the earth? I know the future is digital, just strange to still see so many analog accelerometers available.

Thanks for the help!!

I am trying to simulate shape modes for MEMs gyroscope in COMSOL. I have the structure made with me. However, i am really confused as how to actually simulate it in COMSOL. Are there any guides, courses for this exact requirement? Thanks

I have been assigned a project for design and analysis of MEMS gyroscope as a mechanical engr student. Now MEMS isnt extensively taught in my degree but i am invested in the concept of the technology myself so i decided to undertake this. So i have just a few basic questions to help me get started.

1. suggested design softwares for this purpose?

2. any good book(s) for theoratical and design guidance? Any response and help will be extremely appreciated.

Hi,

I developed an application that uses an STM32L452 and MP34DT06J, with SPI and DMA. I don't have an external clock on the MCU so I'm using the internal one. Regarding the storage, I'm using an external Micro SD driven with SDMMC.

Since I've more sensors acquiring at the same time, for me it's extremely important to know the exact frequency of the signals since it can lead to a misalignment of the signals. When I was recording sound with my application and comparing it with my smartphone, I found that the sampling frequency isn't exactly 16kHz. So the questions are:

1. How can I find the exact frequency?

2. Does the internal clock allow me to have a constant sampling frequency, with drift over time?

Best Regards

Hi guys,

I am writing my master's thesis on MEMS devices.

Can you recommend a review on fabrication techniques?

See title.

I am newish to MEMS and am having an absolutely miserable time finding an SOI wafer vendor that can provide wafers that meet my needs (for a reasonable amount of $$$).

I need a conductive device layer that is <= 1um. The more electrically conductive the better. 4 in would be nice and >= 1 um SiO2 layer would be nice too but are not must haves. Does anyone have any ideas on where to look?

EDIT: had less than/greater than signs flipped

I am looking for an IMU and board that can transfer data to a mobile application to fit within 1.5-1.7 inches in diameter circle. So if it's a square, maybe 1.5-2inches for the sides. I am flexible.

I only need 3-axis, motion will mostly be linear. So if there are other sensor options for pure linear motion that are cheap I am all ears. I wanted to track the linear position of the system.

Trying to avoid getting something printed if it already exists or can be modified.

Hi all,
I am biomedical engineer apart of a startup accelerator. I want to build a wearable ultrasound device. I am able to do all signal processing / hardware for backend however I am looking for a co founder that can build the ultrasound mems device. If anyone is interested please let me know as I think this device will have huge potential.

If you want to have presentable 3D images of your microfabrication layout use this! This is a GUI for opening GDSII files in Blender.

It is very easy to use!

Hi all. I'm a physicist new to working on MEMS devices. I need to make up some lithography masks for a structure of like to build. Anyone have any recommendations where to get started? Online courses etc? Thank you in advance! Any help at all would be great