Berkeley, EE 105

Excerpt: ... 4 Process Flow Examples s Three-mask layout: oxide mask (dark field) contact mask (dark field) metal mask (clear field) , , , , , , , , A (a) , , , , , B A s Process (highly simplified): 1. Grow 500 nm of thermal oxide and pattern using oxide ...

Texas A&M, ET 414

Excerpt: ... Full name:_ HW6, ENTC 414, Fall 08. Due by 6 pm on Thu, Oct 16. 1) Page 65, problem 3.2 Full name:_ Full name:_ 3) Page 65, problem 3.12 Full name:_ 4) Come up with a process plan to mass produce the following structure on a silicon wafer. The "be ...

Stevens, PS 344

Excerpt: ... Problem Set 1 Due: Thursday, 8 September, 2005 at beginning of lecture E-344 Fall 2005 From Section 2 Problems posted on the Core. 2.3 Silicon Wafers 2.6 Na 2.7 Ta and depleted uranium 2.10 Elecron configuration 2.16 Cu energy-level diagram 2.26 electrons in copper 2.30 Interatomic potential of A and B atoms Scan mutliple choice review questions and practice on many of them. ...

UVA, JFG 6

Excerpt: ... [15]. Figure 4 shows a top view of the two heat treated copper samples. Critical challenges: This project is using the university's DVD system for deposition of the metal film. In this project, it is thought that it would be best to deposit a pure metal layer with no detectable contamination. Then, subsequent heat treating would introduce the oxygen into the developing nanostructures. It also seems advantageous, for eventual applications, if the metal films can be synthesized on a silicon wafer from which the native oxide has been removed. Initial auger electron spectroscopy (AES) study of DVD deposited silicon layers [16] reveals the presence of significant amounts of oxygen and carbon contamination in as-deposited films (Figure 9a). (It is anticipated that similar contamination levels would be found in copper films deposited by the DVD technique.) In addition, AES of the silicon wafers found measurable amounts of oxygen and carbon on the wafer surface [16], and an attempt to remove those contaminants via a ...

Sveriges lantbruksuniversitet, E 495

Excerpt: ... rication", Stephen Campbell, Oxford Univ. Press. "Silicon Processing, vol. 1", S. Wolf and R.N. Tauber, (Lattice Press). Prerequisite: The only prerequisites the students need are an understanding of basic transistor and diode operation. ENSC 222/ENSC 225 (Electronic Design I) or equivalent. Lecture Monday, Wednesday 16:30 - 20:20 pm, AQ4120 Lecture Schedule Week 1: Clean Room Technology and Silicon Wafer Production Basic outline of fabrication process: with to real structures. Theory behind clean room operations: History of semiconductor devices: diodes, transistors, Germanium/Silicon transition, monolithic integrated circuits Basic operation of Transistors, diodes Projected trends in Fabrication Theory and operations for contamination elimination, and safety issues. Silicon wafers ; Crystallography, Production and Defects: Basic silicon wafer parameters, solid solubility of dopants in silicon, defects, and basic economics of operations. Week 2: Thermal Oxidation ...

Michigan, EECS 414

Excerpt: ... oints 1 Solution: The final cross section is shown below. The etch will proceeed from the back and will stop as usual on the (111) planes. When the etch reaches the bottom of the square defined by the trench, it will continue to etch towards the top oxide layer, but now a new set of (111) planes will appear inside the square as shown. These planes will go down at an anngle of 54.7 until they reach the top oxide and the etch will stop there. Note that there is a region where you have (111) planes on the inside of the square. 2 2. It was said in lecture that usually anisotropic wet etching of silicon is more desirable than isotropic wet etching. Name 3 uses of isotropic etching. 5 points Solution: Isotropic etching is used for : Removal of damage or polishing Si Creating structures with round surfaces Thinning silicon wafers Delineation of electrical junctions or defects 3. In the top-view diagram below, the shaded part of a p-type (100) Si wafer has a thin p+ (meaning heavily boron dope ...

ECCD, ELEC 3908

Excerpt: ... Intel 8-level damascene copper interconnect Silicon wafer surface - IBM IBM POWER6 - Hundreds of IBM POWER6 microprocessors on a silicon wafer. Each chip has two cores, runs at speeds up to 4.7 GHz, and contains 790 million transistors. IBM P6 Un ...

Johns Hopkins, ECE 495

Excerpt: ... 520/580.495 PHOTOLITHOGRAPHY Andreas G. Andreou Lecture notes adapted from handout notes for Microelectronics: An Integrated Approach http:/www.prenhall.com/howe/microelectronics/ by R. T. Howe and C.G. Sodini A.G. Andreou 2000 1 IC Fabrication T ...

U. Houston, CHEE 1131

Excerpt: ... Homework #3 Introduction to Chemical Engineering 1. Describe the steps required to produce polished silicon wafers , starting with the raw material, SiO2. After oxide is placed on the wafer, the resist is put on. Then the reticule is put over the wafer, where light shines through parts of it to expose the certain pattern on the resist, which is photosensitive. The resist is further progressed, and the excess is cleaned off of the wafer. A dry etch eradicates the unprotected oxides, and then the residual resist is cleaned in wet etch to show the patterned layer of oxide. Then the wafer is washed. That makes a polished silicon wafer. 2. Describe how small features (lines, holes, etc.) are made in integrated circuits. By using photolithography, one can use insulating layer to structure the circuit components. The photoresist toughens the wanted designs. Metallization is where the bonds are created on the integrated circuits. 3. Boron is a common dopant (impurity) in silicon. If a typical silicon wafer with a diam ...

Johns Hopkins, ECE 495

Excerpt: ... 520/580.495 Silicon Oxidation Andreas G. Andreou Lecture notes adapted from Microfabrication handout notes by Norman Sheppard A.G. Andreou 2000 In this lecture we'll cover the processes of oxidation. References: R.C. Jaeger, Introduction to Microel ...

Cal Poly, IME 156

Excerpt: ... Silicon Run II Questions 1. Logic circuits, such as AND, OR and NOT gates, consist of integrated circuits using _ as switches. transistors 2. Logic gates are the "building blocks" of integrated circuits. True/False 3. After the silicon wafer circuit ...

Purdue, PHYS 3

Excerpt: ... Figure : Coordinate Measuring Machine Used with optical video probe for precision alignment of silicon wafers . Used with touch trigger probe for part and fixture inspection. Figure : Electrical Testing Facility. Two 64-channel probe cards are used to test for continuity and shorts. Single probes are used for leakage current and depletion voltage measurements. Figure : K&S wirebonder used for electrical conection of traces between silicon wafers . ...