{"id":230221,"date":"2026-01-31T01:28:27","date_gmt":"2026-01-31T07:28:27","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2026\/01\/paragon-space-charge-neutralized-reflective-electron-projection-lithography"},"modified":"2026-01-31T01:28:27","modified_gmt":"2026-01-31T07:28:27","slug":"paragon-space-charge-neutralized-reflective-electron-projection-lithography","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2026\/01\/paragon-space-charge-neutralized-reflective-electron-projection-lithography","title":{"rendered":"Paragon: Space-Charge-Neutralized Reflective Electron Projection Lithography"},"content":{"rendered":"<p><\/p>\n<p><iframe style=\"display: block; margin: 0 auto; width: 100%; aspect-ratio: 4\/3; object-fit: contain;\" src=\"https:\/\/www.youtube.com\/embed\/TYwd7U1Utx0?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope;\n   picture-in-picture\" allowfullscreen><\/iframe><\/p>\n<p>This is best exemplified by the <a class=\"\" href=\"https:\/\/www.smecc.org\/rca_emt_tabletop.htm\" rel=\"noopener ugc nofollow\" target=\"_blank\">RCA Permanent-Magnet Electron Microscope<\/a>, based on the work of <a class=\"\" href=\"https:\/\/patents.google.com\/patent\/US2503173\" rel=\"noopener ugc nofollow\" target=\"_blank\">John H. Reisner<\/a> and collaborators.<\/p>\n<blockquote class=\"\"><p>\u201cThe permanent magnet as an energizing source for magnetic electron lenses is not new. The use of a permanent magnetic yoke for the comparatively coarse focusing of cathode-ray tubes has long been known. The advantages of permanent magnet lens energization are very appealing \u2014 excellent stability (beyond the ability of any regulator), no heating losses in energizing coils, <a class=\"\" href=\"https:\/\/pubs.aip.org\/aip\/jap\/article-abstract\/22\/5\/561\/597156\/Permanent-Magnet-Lenses?redirectedFrom=fulltext\" rel=\"noopener ugc nofollow\" target=\"_blank\">no need for extensive current supplies and regulators<\/a> \u2014 advantages which heretofore were limited to electrostatic lenses.\u201d<\/p><\/blockquote>\n<p>The Paragon idea is that \u201cdie at once\u201d exposure is the key to high-volume manufacturing with electron projection lithography. Anything that would \u201creduce system throughput and\/or require registration of plural exposures\u201d is forbidden.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This is best exemplified by the RCA Permanent-Magnet Electron Microscope, based on the work of John H. Reisner and collaborators. \u201cThe permanent magnet as an energizing source for magnetic electron lenses is not new. The use of a permanent magnetic yoke for the comparatively coarse focusing of cathode-ray tubes has long been known. The advantages [\u2026]<\/p>\n","protected":false},"author":662,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-230221","post","type-post","status-publish","format-standard","hentry","category-space"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/230221","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/662"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=230221"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/230221\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=230221"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=230221"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=230221"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}