{"id":16,"date":"2011-02-22T18:46:52","date_gmt":"2011-02-22T09:46:52","guid":{"rendered":"http:\/\/hara-mc.racoo.co.jp\/english"},"modified":"2011-02-22T18:46:52","modified_gmt":"2011-02-22T09:46:52","slug":"multicrystal","status":"publish","type":"page","link":"http:\/\/hara-mc1948.co.jp\/english\/silicon\/process\/multicrystal","title":{"rendered":"Polycrystalline silicon"},"content":{"rendered":"\n<ul id=\"processTab\">\n<li id=\"processTab_01\"><a href=\"\/english\/index.php\/silicon\/process\/crystal\">Monocrystalline silicon<\/a><\/li>\n<li id=\"processTab_02\"><a href=\"\/english\/index.php\/silicon\/process\/multicrystal\">Polycrystalline silicon<\/a><\/li>\n<li id=\"processTab_03\"><a href=\"\/english\/index.php\/silicon\/process\/slim-rod\">Slim Rod<\/a><\/li>\n<li id=\"processTab_04\"><a href=\"\/english\/index.php\/silicon\/process\/polysilicon\">Recycling of Polycrystalline silicon<\/a><\/li>\n<\/ul>\n<div class=\"block_read\">\n<p><img loading=\"lazy\" src=\"http:\/\/hara-mc1948.co.jp\/english\/wp-content\/themes\/hara-mc\/images\/page\/silicon\/multicrystal_read.png\" width=\"614\" height=\"38\" alt=\"Polycrystalline silicon wafer manufacturing process and its associated machine tools\" \/><\/p>\n<p>In contrast to the homogenous atom framework of monocrystalline silicon, polycrystalline silicon is composed of a number of smaller crystals or crystallites randomly associated.<\/p>\n<\/p><\/div>\n<div class=\"block block_flow\">\n<h3>Generation of metal silica<\/h3>\n<p class=\"right\"><img loading=\"lazy\" src=\"http:\/\/hara-mc1948.co.jp\/english\/wp-content\/themes\/hara-mc\/images\/page\/silicon\/crystal_photo_01.jpg\" width=\"210\" height=\"140\" \/><\/p>\n<p>Quarry the silica from the mountains, and then restore it to a silicon metal with carbon.<\/p>\n<\/p><\/div>\n<div class=\"block block_flow\">\n<h3>Polycrystalline silicon deposition<\/h3>\n<p class=\"right\"><img loading=\"lazy\" src=\"http:\/\/hara-mc1948.co.jp\/english\/wp-content\/themes\/hara-mc\/images\/page\/silicon\/crystal_photo_02.jpg\" width=\"210\" height=\"140\" \/><\/p>\n<p>Produce Trichlorosilane from silicon metal, and increase the purity of Trichlorosilane through a distilling and purifying process. After high temperature reduction with hydrogen, deposit high-purity polycrystalline silicon (polysilicon).<\/p>\n<\/p><\/div>\n<div class=\"block block_flow\">\n<h3>Polycrystalline silicon generation<\/h3>\n<p class=\"right\"><img loading=\"lazy\" src=\"http:\/\/hara-mc1948.co.jp\/english\/wp-content\/themes\/hara-mc\/images\/page\/silicon\/multicrystal_photo_01.jpg\" width=\"210\" height=\"140\" \/><\/p>\n<p>Melt polysilicon in a furnace, then solidify by cooling it in a crucible.<\/p>\n<\/p><\/div>\n<div class=\"block\">\n<h3>Polycrystalline silicon wafer manufacturing<\/h3>\n<h4>1.Processing to the shape of a prism<\/h4>\n<p class=\"right\"><img loading=\"lazy\" src=\"http:\/\/hara-mc1948.co.jp\/english\/wp-content\/themes\/hara-mc\/images\/page\/silicon\/multicrystal_photo_02.jpg\" width=\"210\" height=\"140\" \/><\/p>\n<p>Severing an ingot to multiple the prisms.<\/p>\n<div class=\"pickup\">\n<div class=\"right\">\n<h5>Bandsaw<\/h5>\n<ul>\n<li>High precision cutting with less kerf loss.<\/li>\n<li>Capable of top &amp; tail cutting of the next process.<\/li>\n<\/ul><\/div>\n<p class=\"left\"><img loading=\"lazy\" src=\"http:\/\/hara-mc1948.co.jp\/english\/wp-content\/themes\/hara-mc\/images\/page\/silicon\/crystal_photo_04.jpg\" width=\"210\" height=\"140\" \/><\/p>\n<\/p><\/div>\n<h4>2. TopTail &amp; cutting<\/h4>\n<p>Cut the top and tail, and remove the surface layer.<\/p>\n<div class=\"pickup\">\n<div class=\"right\">\n<h5>Simple cutter<\/h5>\n<ul>\n<li>Fast cutting of top and tail<\/li>\n<li>Cost performance is better than a bandsaw<\/li>\n<\/ul><\/div>\n<p class=\"left\"><img loading=\"lazy\" src=\"http:\/\/hara-mc1948.co.jp\/english\/wp-content\/themes\/hara-mc\/images\/page\/silicon\/multicrystal_photo_03.jpg\" width=\"210\" height=\"140\" \/><\/p>\n<\/p><\/div>\n<h4>3. Risk aversion treatment<\/h4>\n<p class=\"right\"><img loading=\"lazy\" src=\"http:\/\/hara-mc1948.co.jp\/english\/wp-content\/themes\/hara-mc\/images\/page\/silicon\/crystal_photo_07.jpg\" width=\"210\" height=\"140\" \/><\/p>\n<p>To avoid any risk in the slicing process of wafer manufacturing, the end face of the quadrangular prism is grinded to 90 degrees.<\/p>\n<div class=\"pickup\">\n<div class=\"right\">\n<h5>Face grinding equipment<\/h5>\n<ul>\n<li>Grind the end face of a silicon block in high precision for solar use.<\/li>\n<li>Revise the end squareness of a silicon ingot to an accurate angle through grinding, to avoid the wire from breaking in the slicing process which occurs due to inaccurate end squareness.<\/li>\n<\/ul><\/div>\n<p class=\"left\"><img loading=\"lazy\" src=\"http:\/\/hara-mc1948.co.jp\/english\/wp-content\/themes\/hara-mc\/images\/page\/silicon\/crystal_photo_08.jpg\" width=\"210\" height=\"140\" \/><\/p>\n<\/p><\/div>\n<h4>\uff14. Treatment of wafer yield enhancement<\/h4>\n<p class=\"right\"><img loading=\"lazy\" src=\"http:\/\/hara-mc1948.co.jp\/english\/wp-content\/themes\/hara-mc\/images\/page\/silicon\/crystal_photo_09.jpg\" width=\"210\" height=\"140\" \/><\/p>\n<p>To improve the yield of the wafer, the damaged layers of the R-surface and the flat plane are removed through grinding and polishing.<\/p>\n<div class=\"pickup\">\n<div class=\"right\">\n<h5>Multi-axis grinding and polishing equipment<\/h5>\n<ul>\n<li>With a multi-axis head, the device grinds and polishes the plane, the R-surface and C-surface.<\/li>\n<li>By using a work-stocker, the machine runs 24 hours a day from injection, via cutting and polishing, to the ejection of the work.<\/li>\n<\/ul>\n<p><a href=\"\/english\/index.php\/silicon\/machine\/multi-axis-grinding-and-polishing-equipment\">> Check details<\/a><\/p>\n<\/p><\/div>\n<p class=\"left\"><img loading=\"lazy\" src=\"http:\/\/hara-mc1948.co.jp\/english\/wp-content\/themes\/hara-mc\/images\/page\/silicon\/crystal_photo_10.jpg\" width=\"210\" height=\"140\" \/><\/p>\n<\/p><\/div>\n<h4>\uff15. Wafer manufacturing<\/h4>\n<p class=\"right\"><img loading=\"lazy\" src=\"http:\/\/hara-mc1948.co.jp\/english\/wp-content\/themes\/hara-mc\/images\/page\/silicon\/crystal_photo_11.jpg\" width=\"210\" height=\"140\" \/><\/p>\n<p>Slice with wire-saw and manufacture wafer. <\/p>\n<\/p><\/div>\n<div class=\"block_bottom\">\n<h3>Various processing of polycrystalline silicon<\/h3>\n<p><img loading=\"lazy\" src=\"http:\/\/hara-mc1948.co.jp\/english\/wp-content\/themes\/hara-mc\/images\/page\/silicon\/multicrystal_photo_04.jpg\" width=\"210\" height=\"140\" \/><\/p>\n<div class=\"pickup\">\n<div class=\"right\">\n<h5>Polycrystalline silicon ingot cutting machine<\/h5>\n<ul>\n<li>Cutting polycrystalline silicon ingots in order to remove impurities effectively in the later process of polycrystalline silicon manufacturing.<\/li>\n<\/ul><\/div>\n<p class=\"left\"><img loading=\"lazy\" src=\"http:\/\/hara-mc1948.co.jp\/english\/wp-content\/themes\/hara-mc\/images\/page\/silicon\/multicrystal_photo_05.jpg\" width=\"210\" height=\"140\" \/><\/p>\n<\/p><\/div>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Monocrystalline silicon Polycrystalline silicon Slim Rod Recycling of Polycrystalline silicon In contrast to t [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":8,"menu_order":1,"comment_status":"open","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"http:\/\/hara-mc1948.co.jp\/english\/wp-json\/wp\/v2\/pages\/16"}],"collection":[{"href":"http:\/\/hara-mc1948.co.jp\/english\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/hara-mc1948.co.jp\/english\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/hara-mc1948.co.jp\/english\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/hara-mc1948.co.jp\/english\/wp-json\/wp\/v2\/comments?post=16"}],"version-history":[{"count":0,"href":"http:\/\/hara-mc1948.co.jp\/english\/wp-json\/wp\/v2\/pages\/16\/revisions"}],"up":[{"embeddable":true,"href":"http:\/\/hara-mc1948.co.jp\/english\/wp-json\/wp\/v2\/pages\/8"}],"wp:attachment":[{"href":"http:\/\/hara-mc1948.co.jp\/english\/wp-json\/wp\/v2\/media?parent=16"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}