Location History:
- Palo Alto, CA (US) (1977 - 1980)
- Atherton, CA (US) (1987)
Company Filing History:
4 out of 1,222 
2 out of 8 
2 out of 4,791 
Years Active: 1977-1987
Introduction
Joel A. Karp is a notable inventor based in Palo Alto, California, known for his significant contributions to the field of memory technology. With a portfolio of eight patents, Karp has been instrumental in the advancement of MOS and CMOS memory cells, combining innovative design with practical applications.
Latest Patents
One of Karp's latest patents is for a **MOS/CMOS memory cell**, which features a memory array of four IGFET-transistor cells organized in rows and columns. This sophisticated array employs two patterned metal layers and two patterned poly-silicon layers. Each column contains a pair of metal differential bit lines that are formed on the first patterned metal layer. The design includes a unique system of split equipotential poly-silicon word lines, along with a parallel metal word line that connects to these split lines at designated intervals. The addition of a grounded poly-silicon plate over the memory nodes provides essential alpha particle protection and decouples the bit lines from the capacitive nodes.
Karp is also credited with developing an improved **dynamic RAM memory** device. This innovative dynamic random-access memory (DRAM) device features an array of dynamic RAM cells that are accessed via word and bit lines. Each memory cell consists of a single field-effect transistor coupled to an MOS storage capacitor. The memory cells are organized in a configuration that alternates adjacent polysilicon lines for the bit lines and word lines, enhancing the device's efficiency and performance.
Career Highlights
Throughout his career, Joel A. Karp has worked with prominent companies in the technology sector, including Burroughs, Inc. and Visic, Inc. His expertise and contributions have advanced the state of memory technology, making lasting impacts in the industry.
Collaborations
Karp has collaborated with talented individuals in the field, notably John A. Reed and Steven M. Baldwin. This teamwork has fostered an environment of innovation and excellence, contributing to the success of their joint projects and the advancement of technology.
Conclusion
Joel A. Karp's innovative spirit and dedication to the development of memory technologies mark him as a significant inventor in his field. With a focus on practical and efficient designs, his patents are set to influence the future of memory solutions for years to come.