when was the integrated circuit invented

{"cid":"91131620","title":"Sealing Alloy Precision Alloy 4J29 Kovar Alloy Strip Expansion alloy Vacon 12 Fe Ni","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/c9\/0f\/878af6da3178b54113c9ac429250-200x200-1.jpg","attrs":{"Price":"USD 30~50\/ kg","Brand Name":"Sealing Alloy 4J29","Model Number":"Kovar \/ 29\u041d\u041a \/ 4J29","Minimum Order Quantity":"10KG","Delivery Time":"10~15day","Certification":"ISO 9001 and RoHS","Place of Origin":"China","Payment Terms":"T\/T, Western Union, L\/C, Paypal","Supply Ability":"30000KG per month","Packaging Details":"Waterproof paper, Carton and Wooden Case","Shape":"Strip, Foil, Sheet, Wire","Condition":"Bright\/ Oxidized; Soft\/ Hard","Standard":"YB\/T5231-2005 \/ \u0413\u041e\u0421\u0422 14080-78","Color":"Silver","Weight of coil":"1~45 KG","density":"8.4"}}

{"cid":"91169044","title":"Anti Corrosion Alumina Ceramic Parts Slip Free Ceramic Vertical Rack With Rounded Horizontal Arms","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/e2\/df\/e9e32bc6d3cec64b740e11d64757-200x200-1.jpg","attrs":{"Price":"negotiation","Brand Name":"Mingrui","Model Number":"XF-1011","Minimum Order Quantity":"10PCS","Delivery Time":"10-30 working days after receiving deposit","Certification":"ISO9001-2015","Place of Origin":"Guangdong, China(mainland)","Payment Terms":"L\/C, T\/T, Western Union, MoneyGram, Paypal","Supply Ability":"5000pcs per week","Packaging Details":"Packed in PP bag or sponge tray, then put in standard export carton packing, or OEM packing.","Product name":"Ceramic Vertical Rack","Material":"Alumina ceramic","Features":"anti corrosion slip free","Highest application temperature":"2200 C, or customized","Bending strength":"300 MPA, or customized","Compressive Strength":"3400 MPA, or customized","Density":"3.9g\/cm3 , or customized","Color":"White, yellow, or customized","Size":"Customized","Application":"Wafer Carrier"}}

{"cid":"91192225","title":"Stainless Steel Check Weigher Machine For Cosmetical Packaging Sachet Boxes EW 220","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/a2\/12\/8652862a5e791875ea013337a772-200x200-1.jpg","attrs":{"Price":"USD 8000\/SET","Brand Name":"LVHUA","Model Number":"EW-220","Minimum Order Quantity":"1 SET","Delivery Time":"20 WORKING DAYS","Certification":"CE","Place of Origin":"CHINA","Payment Terms":"L\/C, T\/T","Supply Ability":"200 SETS PER MONTH","Packaging Details":"STANDARD WOODEN CASE","Material of Frame":"SUS304","Weighing range (g)":"3-1000","Minimum scale (g)":"0.1","Accuracy (g)":"\u00b10.3","Max throughput (pcs\/min)":"80","Width of weighing belt mm":"220","Direction of throughput":"From left to right when facing control panel","power":"AC220-240V 1Phase, 300W","Alarm mode":"Aural and visual"}}