References to silicon carbide heating elements exist from the early 20th century when they were being produced by Acheson's Carborundum Co. from the U.S. and EKL in Berlin. Silicon carbide made available enhanced operating temperatures compared with metallic heaters. For off state stress protection by deep p-areas is adopted, for https://www.facebook.com/permalink.php?story_fbid=pfbid02M3pzSNhRs3pYNi8TrH5kEbpVmTNxMFUWpQBP8w3XJUcJy1bwKkPGxEg1Ck1cB8vWl&id=61560512640678&__cft__[0]=AZWImNtQj8D89AUGxg60JG4mCqOvBFcgVC_YGPylERzWhz1_PvNqY3NN3q6xCHwK5gm5J69AQ_uDY5mKKeAXVvowAA8nfq1FXdzqw_pl8WO1H89mnKMy_8JIVA_mTv-1HZXjWfhrePyYN8IN2dcqwha-x4G3-9M2AlyiqVoTkhY4TuTA0G6T2molbK0z22dJnEf9wHQInQvfDMnHY3nQqKLd&__tn__=%2CO%2CP-R