M2_ Practice Problems 2

11/16/23, 6:35 PM M2: Practice Problems 2—MOS Capacitor Example: BSAN 706: Statistics https://kuconnect.ku.edu/courses/3310/quizzes/18503?module_item_id=219573 1/20 M2: Practice Problems 2—MOS Capacitor Example Due Oct 26 at 11:59pm Points 1 Questions 9 Time Limit None Instructions For this task, you will answer questions regarding the problem documented below. After answering each question, you will be able to see the correct choice. You will receive full credit for this activity provided that you answer all questions to the best of your ability. At the end of this task, you will need to affirm that you have made an honest effort to answer all questions. Note that there is no time limit. You should submit your completed problems by the due date. The practice problems are based on the following scenario: During the manufacture of an MOS capacitor, different cleaning processes were used by two manufacturing systems in parallel. Process A used a standard cleaning solution, while Process B used a different cleaning mixture that contained less particulate matter. The failure cause observed with each process for five consecutive days is listed below. Process Date Cause Count A March 1 Contamination 15 A March 1 Corrosion 2 A March 1 Doping 1 A March 1 Metallization 3 A March 1 Miscellaneous 3 A March 1 Oxide Defect 8 A March 1 Silicon Defect 1

11/16/23, 6:35 PM M2: Practice Problems 2—MOS Capacitor Example: BSAN 706: Statistics https://kuconnect.ku.edu/courses/3310/quizzes/18503?module_item_id=219573 2/20 A March 2 Contamination 16 A March 2 Corrosion 3 A March 2 Doping 1 A March 2 Metallization 3 A March 2 Miscellaneous 1 A March 2 Oxide Defect 9 A March 2 Silicon Defect 2 A March 3 Contamination 20 A March 3 Corrosion 1 A March 3 Doping 1 A March 3 Metallization 0 A March 3 Miscellaneous 3 A March 3 Oxide Defect 7 A March 3 Silicon Defect 2 A March 4 Contamination 12 A March 4 Corrosion 1 A March 4 Doping 1 A March 4 Metallization 0

11/16/23, 6:35 PM M2: Practice Problems 2—MOS Capacitor Example: BSAN 706: Statistics https://kuconnect.ku.edu/courses/3310/quizzes/18503?module_item_id=219573 4/20 B March 1 Silicon Defect 3 B March 2 Contamination 9 B March 2 Corrosion 0 B March 2 Doping 1 B March 2 Metallization 2 B March 2 Miscellaneous 4 B March 2 Oxide Defect 9 B March 2 Silicon Defect 2 B March 3 Contamination 4 B March 3 Corrosion 1 B March 3 Doping 1 B March 3 Metallization 0 B March 3 Miscellaneous 0 B March 3 Oxide Defect 10 B March 3 Silicon Defect 1 B March 4 Contamination 2 B March 4 Corrosion 2 B March 4 Doping 1

11/16/23, 6:35 PM M2: Practice Problems 2—MOS Capacitor Example: BSAN 706: Statistics https://kuconnect.ku.edu/courses/3310/quizzes/18503?module_item_id=219573 5/20 Score for this survey: 1 out of 1 Submitted Oct 25 at 3:55pm This attempt took 13 minutes. B March 4 Metallization 0 B March 4 Miscellaneous 3 B March 4 Oxide Defect 7 B March 4 Silicon Defect 1 B March 5 Contamination 1 B March 5 Corrosion 3 B March 5 Doping 1 B March 5 Metallization 0 B March 5 Miscellaneous 1 B March 5 Oxide Defect 8 B March 5 Silicon Defect 2 Question 1 The following is a Pareto Chart based on the different types of failures. This is a chart of the number of defects by type of failure.

11/16/23, 6:35 PM M2: Practice Problems 2—MOS Capacitor Example: BSAN 706: Statistics https://kuconnect.ku.edu/courses/3310/quizzes/18503?module_item_id=219573 7/20 1. What conclusion can be drawn from this Pareto chart? 2. What would be a good follow-up action based upon this Pareto chart? Answer: There is a breakpoint after Oxide. This suggests that Contamination and Oxide failures are the vital few types of failures. An appropriate follow up action with this example and the data that is given is the same for both Contamination and Oxide failure. First a second order Pareto diagram could be constructed for the two processes and for the date. Another possible follow up is to ask people who might know the causes of Contamination failures (separately Oxide failures) to help construct a list of these types of failures. Once this list is constructed, changes can be made to control or eliminate the most likely item on the list and see if these changes lead to a reduction in this type of defect. Question 2 The following is a Pareto chart based on the different processes. This is a plot of the number of defects by process.

11/16/23, 6:35 PM M2: Practice Problems 2—MOS Capacitor Example: BSAN 706: Statistics https://kuconnect.ku.edu/courses/3310/quizzes/18503?module_item_id=219573 8/20 Your Answer: 1. What conclusion can be drawn from this Pareto chart? 2. What would be a good follow up action based upon this Pareto chart? 1. No break point 2. No further action is needed The following is a Pareto chart based on the different processes. This is a plot of the number of defects by process.

11/16/23, 6:35 PM M2: Practice Problems 2—MOS Capacitor Example: BSAN 706: Statistics https://kuconnect.ku.edu/courses/3310/quizzes/18503?module_item_id=219573 10/20 2. No further action is needed The following is a Pareto chart based on the different dates. This is a plot of the number of defects by the date. 1. What conclusion can be drawn from this Pareto chart? 2. What would be a good follow up action based upon this Pareto chart? Answer: There is no break point in this Pareto chart. No follow up action is required. Question 4 The following Pareto chart only considers the contamination failures. This is a second level Pareto chart based on the process (only using contamination failures).

11/16/23, 6:35 PM M2: Practice Problems 2—MOS Capacitor Example: BSAN 706: Statistics https://kuconnect.ku.edu/courses/3310/quizzes/18503?module_item_id=219573 11/20 Your Answer: 1. What conclusion can be drawn from this Pareto chart? 2. What would be a good follow up action based upon this Pareto chart? 1. There is a break point after process A 2. Compare the process A to process B and see why there may be an increase in contamination with process A The following Pareto chart only considers the contamination failures. This is a second level Pareto chart based on the process (only using contamination failures).

11/16/23, 6:35 PM M2: Practice Problems 2—MOS Capacitor Example: BSAN 706: Statistics https://kuconnect.ku.edu/courses/3310/quizzes/18503?module_item_id=219573 13/20 Your Answer: Pareto chart for the date based on contamination failures in process A. 1. What conclusion can be drawn from this Pareto chart? 2. What would be a good follow up action based upon this Pareto chart? 1. There is no break point 2. No further action is needed The following Pareto chart only considers contamination failures that occurred in process A. These defects are plotted according to the date on which the defect occurred. This is a third level Pareto chart for the date based on contamination failures in process A.

11/16/23, 6:35 PM M2: Practice Problems 2—MOS Capacitor Example: BSAN 706: Statistics https://kuconnect.ku.edu/courses/3310/quizzes/18503?module_item_id=219573 14/20 1. What conclusion can be drawn from this Pareto chart? 2. What would be a good follow up action based upon this Pareto chart? Answer: There is no break point in this Pareto chart. No follow up action is required. Question 6 The following Pareto chart only considers the contamination failures. This is a second level Pareto chart based on the date

11/16/23, 6:35 PM M2: Practice Problems 2—MOS Capacitor Example: BSAN 706: Statistics https://kuconnect.ku.edu/courses/3310/quizzes/18503?module_item_id=219573 16/20 (only using contamination failures). 1. What conclusion can be drawn from this Pareto chart? 2. What would be a good follow up action based upon this Pareto chart? Answer: There is a possible break point between March 1 and March 4. This suggests that the contamination failures are lower on March 4 than the other days. An appropriate follow up action is to list the differences in the conditions on March 4 compared to the other days that could cause contamination failures. Once this list is developed take the most likely possible causes and make changes to control or eliminate that cause. If the number of contamination failures on the days other than March 4 are reduced, then the root cause has been found. Question 7 The following Pareto chart only considers the oxide defects. This is a second level Pareto chart based on the process (only using oxide defects).

11/16/23, 6:35 PM M2: Practice Problems 2—MOS Capacitor Example: BSAN 706: Statistics https://kuconnect.ku.edu/courses/3310/quizzes/18503?module_item_id=219573 17/20 Your Answer: 1. What conclusion can be drawn from this Pareto chart? 2. What would be a good follow up action based upon this Pareto chart? 1. There is no break point 2. No further action is needed The following Pareto chart only considers the oxide defects. This is a second level Pareto chart based on the process (only using oxide defects).

11/16/23, 6:35 PM M2: Practice Problems 2—MOS Capacitor Example: BSAN 706: Statistics https://kuconnect.ku.edu/courses/3310/quizzes/18503?module_item_id=219573 19/20 Your Answer: 1. What conclusion can be drawn from this Pareto chart? 2. What would be a good follow up action based upon this Pareto chart? 1. There is no break point 2. No follow up action is needed The following Pareto chart only considers the oxide defects. This is a second level Pareto chart based on the date (only using oxide defects).

11/16/23, 6:35 PM M2: Practice Problems 2—MOS Capacitor Example: BSAN 706: Statistics https://kuconnect.ku.edu/courses/3310/quizzes/18503?module_item_id=219573 20/20 1. What conclusion can be drawn from this Pareto chart? 2. What would be a good follow up action based upon this Pareto chart? Answer: There is no break point in this Pareto diagram. No follow up action is required. Question 9 I affirm that I have made an honest, good-faith effort to complete these questions to the best of my ability. I recognize that my score may be changed if it is later determined that I have not answered these questions in good faith. Accept u Answered u Answered Survey Score: 1 out of 1