My first job out of college in 1972 was writing software to test memory chips at Fairchild Semiconductor in Moutain View, CA. At that time, each chip was quickly tested before the wafer was scored and broken apart. The wafer tester would step from chip to chip and drop a set of probes on the connection pads to execute the test. When a chip failed, a drop of red ink would be deposited on the chip to indicate that it should not be assembled into a package. They were so desperate for yield then that if one (or multiple in the right locations) memory cells failed, such chips were put into one of five special categories such that their address lines could be connected in such a way that five memory chips could appear as four fully functional chips.
Thank you very much sir. Your elaborate tutorials have helped me to increase my knowledge base. I'm from the EDA industry and I'm currently working on Yield exploration and management related projects. I can't thank you enough for spreading your knowledge and experience via these tutorials.
Thank you sir. I don`t know if you are still giving this course but believe me by sharing your lectures here, you reached a lot of people even me. I am a mechanical engineer (means I have no idea about electronics) and was just making some research on the internet about semiconductors then you appeared as a sun for me. I am a big fan of your lectures and learned from you. Many many thanks for your time and your efforts. Regards,
My first job out of college in 1972 was writing software to test memory chips at Fairchild Semiconductor in Moutain View, CA. At that time, each chip was quickly tested before the wafer was scored and broken apart. The wafer tester would step from chip to chip and drop a set of probes on the connection pads to execute the test. When a chip failed, a drop of red ink would be deposited on the chip to indicate that it should not be assembled into a package.
They were so desperate for yield then that if one (or multiple in the right locations) memory cells failed, such chips were put into one of five special categories such that their address lines could be connected in such a way that five memory chips could appear as four fully functional chips.
yield rigging
Thank you very much sir. Your elaborate tutorials have helped me to increase my knowledge base. I'm from the EDA industry and I'm currently working on Yield exploration and management related projects. I can't thank you enough for spreading your knowledge and experience via these tutorials.
PDF copies of all the slides in this course are available at:
www.lithoguru.com/scientist/CHE323/course.html
Thank you sir. I don`t know if you are still giving this course but believe me by sharing your lectures here, you reached a lot of people even me. I am a mechanical engineer (means I have no idea about electronics) and was just making some research on the internet about semiconductors then you appeared as a sun for me. I am a big fan of your lectures and learned from you. Many many thanks for your time and your efforts. Regards,
I'm glad you find them useful!
Great lecture on basic understanding.
Thank you very much Professor. You are simply awesome.
Thank you for the articulate lecture. Enjoyed it.
This lecture method is 7 years ahead of this time
thank you