EE 147/247A Introduction to MEMS

Fall 2021

TuTh 12:30-2

Class info, homework questions, discussion, etc: piazza

Grades: bcourses

All homework

All Old Exams

Archives from previous semesters.  Note that there are many homework solutions posted here!  These are fair game, as long as you cite the source if you copy them directly.  If you *don’t* cite the source when you copy directly, that’s cheating.  See below.

My policy on CHEATING.  READ IT!

Instructor

 

Office Hours

Kristofer S.J. Pister, pister@eecs.berkeley.edu

512 Cory Hall 

M 3-4, Th 2-3 or by email appointment.

TA

Office Hours

Dillon Acker-James, dackerjames@berkeley.edu

M 10-11, W 12-1  location TBA

Required Texts

none

Useful Texts

Jaeger, Introduction to Microelectronic Fabrication, 2nd edition, (highly recommended)

-----------------------------------------------------

Kaajakari, Practical MEMS

Kubby, A Guide to Hands-on MEMS Design and Prototyping

Korvink & Paul, MEMS: A Practical Guide to Design, Analysis, and Applications

Kovacs, Micromachined Transducers Sourcebook

Liu, Foundations of MEMS, 2nd edition

Senturia, Microsystem Design

Madou, Fundamentals of Microfabrication

Young, Roark’s Formulas for Stress and Strain

 

Grading

 

EE147

EE247A

Homework

35%

35%

Midterm

25%

15%

Final 

40%

30%

Final Project

 

25%

 

homework

Collaboration is encouraged; copying is not.  Explaining how you solved a problem to someone is fine; handing them your solutions is not.  Helping someone debug their design is fine; giving them your design is not.

Write your own answers without staring at someone else's. (see cheating policy above)

Lectures

My nearly indecipherable notes are generally online a day or two after class (linked below).



Schedule

Week

Date/

Notes

Topic

Reading / Resources

homework

1

8/26

Logistics; What is MEMS; Applications; Course overview, history

Single-mask SOI process

Single-mask SOI motor

Jaeger: skim chapter 1, and 2.1—2.4.  Make sure that you understand Figures 2.{2, 6, 7, 9+11}

 

2

8/31

9/2

Single-mask capacitive accelerometer

simple differential capacitive accelerometer

Electrostatic Actuators; Surface micromachining; three-mask process;

Jaeger: 11.1, 11.4

3

9/7

9/9

Surface micromachining: 1 and 2 poly processes

Standard Processes: SOIMUMPs, POLYMUMPs, polyMUMPS pictures, SOIMUMPS pictures; stress and strain

polyMUMPS thermal actuator

Sandia motor videos

planar robot video

 

4

9/14

9/16

beam bending,

flexure design, torsion,

residual stress, stress gradients, buckling

Euler-Bernoulli beams

optional reading: Silicon Failure

5

9/21

9/23

Couette damping, (squeeze-film damping)

Resonance, transfer function

Tang, Nguyen, Howe comb drive resonator

Inchworms

6

9/28

9/30

Transfer function

 

7

10/5

10/7

Self-sustaining oscillators; Piezoresistivity, strain gauges

Wheatstone, TCR

stability and pull-in, spring tuning

Fall 2013 midterm

Fall 2014 midterm

Fall 2015 midterm

Fall 2016 midterm

Fall 2017 midterm

Fall 2020 midterm

TCR Gauge factor Black body

8

10/12

10/14

Midterm

Rayleigh-Ritz, Paschen, Field emission

thermal conduction, black body radiation

2016 Midterm solutions

247A project

9

10/19

10/21

MEMS fabrication, HNA, XeF2

bulk micromachining: crystal planes, etch rates

KOH etching

Jaeger Ch 11

10

10/26

10/28

Plasma etching

Standard processes; Semiconductors: Bohr à diodes

Ion implantation; diffusion; thermal oxidation; diffused piezoresistor

Jaeger Ch 6

11

11/2

11/4

CMOS process cross section

Standard processes: CMOS MEMS

fabrication: evaporation, liftoff

Invensense/Nasiri

Nasiri paper

CMOS-MEMS

Fedder2002 Intel 22nm Jaeger 9.3

12

11/9

11/11

fabrication: sputtering

Veterans Day – Academic and Administrative Holiday

Wikipedia:sputter deposition

 

13

11/16

11/18

plasma etching; RIE ; DRIE

LPCVD;

Residual stress

Jaeger

 

14

11/23

11/25

 

Thanksgiving non-instructional day

academic holiday

 

15

11/30

12/2

LPCVD: mousebites, sidewalls

thermal noise

noise equivalent input; stiction

 

16

12/7

12/9

RRR week;  

247: Final projects due 5pm Monday 12/7 by both email and hardcopy at 512 Cory Hall.

Fall2013 Final

Fall2014 Final

2015 Final

2015 Final Solutions

2016 Final

2016 rubric