Magnetic bubble memory devices

Yttrium aluminum garnet (YAG), Magnetic bubble memory devices... 

Specifically for the passivation of temperature sensitive bubble memory devices,these ultrapure materials proved to be of great value. A cure process was optimized to obtain a reliable low temperature cure without affecting the magnetic coercivities of the bubble memory devices. A positive resist process, using a simple development step to pattern via holes in devices has been optimized and successfully used to fabricate devices. The devices fabricated using the the polyimide process have been compared with conventional SiC offers reliable passivations with thinner stress free films for passivations. The fabrications involve simple inexpensive process steps and are compatible with conventional resist processes. The reliability of the imide passivated devices can be considerably enhanced by the use of ultrapure starting materials to preclude harmful ionic mobilities through passivated layers. 

The manufacture of thin film products does not only apply to the making of integrated circuits but also magnetic bubble memories, thin film recording heads, tapes and disks. The physical and chemical processes carried out involve heat and mass transfer, momentum transfer, surface phenomena, high temperature chemistry, radiation, etc. Although the material discussed in this book focuses on the manufacture and fundamentals of integrated circuits, many of the basics are applicable to the fabrication of other thin film devices. 

The continuous dynode electron multiplier (channeltron) is another device (Adams and Manley (1965)) which takes advantage of unique properties of amorphous semiconductors and considerable appUed research is devoted to the utilization of vitreous materials for optical mass memories (Ovshinsky (1969) Feinleib et al (1971)) high energy particle detectors (Srinivasan et al (1971)) ultrasonic delay lines (Krause et al (1970)) and magnetic bubble domain memories (Chaudhari etal (1973)). 

Memory One of the three basic components of a computer. Memory stores information in binary form. Various types of memory are disk, drum, semiconductor, magnetic core, charge-coupled devices, bubble domain, etc. 

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