Chip C4 assembly improvement using magnetic force and adhesive
A method, and associated structure, for adhesively coupling a chip to an organic chip carrier. The chip is attached to a top surface of the organic chip carrier by interfacing a solder bump between a C4 solder structure on the chip and a pad on a top surface of the chip carrier. The melting temperat...
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| creator | JAPP ROBERT M PIERSON MARK V DOWNES, JR. FRANCIS J |
| description | A method, and associated structure, for adhesively coupling a chip to an organic chip carrier. The chip is attached to a top surface of the organic chip carrier by interfacing a solder bump between a C4 solder structure on the chip and a pad on a top surface of the chip carrier. The melting temperature of the solder bump is less than the melting temperature of the C4 solder structure. A block of ferrous material is placed on a top surface of the chip. A temporary or permanent stiffener of ferrous material is placed on the top surface of the chip carrier. A permanent magnet is coupled to a bottom surface of the chip carrier. Alternatively, an electromagnetic could be utilized instead of the electromagnet. Due to the permanent magnet or the electromagnet, a magnetic force on the stiffener is directed toward the magnet and substantially flattens the first surface of the chip carrier. Similarly, a magnetic force on the block is directed toward the magnet such that the electronic component and the chip carrier are held in alignment. The solder bump is reflowed at a temperature between the melting temperature of the solder bump and the melting temperature of the C4 solder structure. The reflowing reconfigures the solder bump. The magnetic force on the block frictionally clamps the reflowed solder between the C4 solder structure and the pad. The chip and carrier are cooled, resulting in the C4 solder structure being adhesively and conductively coupled to the pad. |
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The chip is attached to a top surface of the organic chip carrier by interfacing a solder bump between a C4 solder structure on the chip and a pad on a top surface of the chip carrier. The melting temperature of the solder bump is less than the melting temperature of the C4 solder structure. A block of ferrous material is placed on a top surface of the chip. A temporary or permanent stiffener of ferrous material is placed on the top surface of the chip carrier. A permanent magnet is coupled to a bottom surface of the chip carrier. Alternatively, an electromagnetic could be utilized instead of the electromagnet. Due to the permanent magnet or the electromagnet, a magnetic force on the stiffener is directed toward the magnet and substantially flattens the first surface of the chip carrier. Similarly, a magnetic force on the block is directed toward the magnet such that the electronic component and the chip carrier are held in alignment. The solder bump is reflowed at a temperature between the melting temperature of the solder bump and the melting temperature of the C4 solder structure. The reflowing reconfigures the solder bump. The magnetic force on the block frictionally clamps the reflowed solder between the C4 solder structure and the pad. The chip and carrier are cooled, resulting in the C4 solder structure being adhesively and conductively coupled to the pad.</description><edition>7</edition><language>eng</language><subject>BASIC ELECTRIC ELEMENTS ; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS ; CLADDING OR PLATING BY SOLDERING OR WELDING ; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING ; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ; ELECTRICITY ; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC ; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS ; MACHINE TOOLS ; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ; METAL-WORKING NOT OTHERWISE PROVIDED FOR ; PERFORMING OPERATIONS ; PRINTED CIRCUITS ; SEMICONDUCTOR DEVICES ; SOLDERING OR UNSOLDERING ; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ; TECHNICAL SUBJECTS COVERED BY FORMER USPC ; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ; TRANSPORTING ; WELDING ; WORKING BY LASER BEAM</subject><creationdate>2000</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20001107&DB=EPODOC&CC=US&NR=6142361A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,309,781,886,25566,76549</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20001107&DB=EPODOC&CC=US&NR=6142361A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>JAPP; ROBERT M</creatorcontrib><creatorcontrib>PIERSON; MARK V</creatorcontrib><creatorcontrib>DOWNES, JR.; FRANCIS J</creatorcontrib><title>Chip C4 assembly improvement using magnetic force and adhesive</title><description>A method, and associated structure, for adhesively coupling a chip to an organic chip carrier. The chip is attached to a top surface of the organic chip carrier by interfacing a solder bump between a C4 solder structure on the chip and a pad on a top surface of the chip carrier. The melting temperature of the solder bump is less than the melting temperature of the C4 solder structure. A block of ferrous material is placed on a top surface of the chip. A temporary or permanent stiffener of ferrous material is placed on the top surface of the chip carrier. A permanent magnet is coupled to a bottom surface of the chip carrier. Alternatively, an electromagnetic could be utilized instead of the electromagnet. Due to the permanent magnet or the electromagnet, a magnetic force on the stiffener is directed toward the magnet and substantially flattens the first surface of the chip carrier. Similarly, a magnetic force on the block is directed toward the magnet such that the electronic component and the chip carrier are held in alignment. The solder bump is reflowed at a temperature between the melting temperature of the solder bump and the melting temperature of the C4 solder structure. The reflowing reconfigures the solder bump. The magnetic force on the block frictionally clamps the reflowed solder between the C4 solder structure and the pad. The chip and carrier are cooled, resulting in the C4 solder structure being adhesively and conductively coupled to the pad.</description><subject>BASIC ELECTRIC ELEMENTS</subject><subject>CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS</subject><subject>CLADDING OR PLATING BY SOLDERING OR WELDING</subject><subject>CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING</subject><subject>ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR</subject><subject>ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR</subject><subject>ELECTRICITY</subject><subject>GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC</subject><subject>GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS</subject><subject>MACHINE TOOLS</subject><subject>MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS</subject><subject>METAL-WORKING NOT OTHERWISE PROVIDED FOR</subject><subject>PERFORMING OPERATIONS</subject><subject>PRINTED CIRCUITS</subject><subject>SEMICONDUCTOR DEVICES</subject><subject>SOLDERING OR UNSOLDERING</subject><subject>TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION</subject><subject>TECHNICAL SUBJECTS COVERED BY FORMER USPC</subject><subject>TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS</subject><subject>TRANSPORTING</subject><subject>WELDING</subject><subject>WORKING BY LASER BEAM</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2000</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLBzzsgsUHA2UUgsLk7NTcqpVMjMLSjKL0vNTc0rUSgtzsxLV8hNTM9LLclMVkjLL0pOVUjMS1FITMlILc4sS-VhYE1LzClO5YXS3Azybq4hzh66qQX58anFBYnJqUCt8aHBZoYmRsZmho7GhFUAAG4yL4c</recordid><startdate>20001107</startdate><enddate>20001107</enddate><creator>JAPP; ROBERT M</creator><creator>PIERSON; MARK V</creator><creator>DOWNES, JR.; FRANCIS J</creator><scope>EVB</scope></search><sort><creationdate>20001107</creationdate><title>Chip C4 assembly improvement using magnetic force and adhesive</title><author>JAPP; ROBERT M ; PIERSON; MARK V ; DOWNES, JR.; FRANCIS J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US6142361A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2000</creationdate><topic>BASIC ELECTRIC ELEMENTS</topic><topic>CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS</topic><topic>CLADDING OR PLATING BY SOLDERING OR WELDING</topic><topic>CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING</topic><topic>ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR</topic><topic>ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR</topic><topic>ELECTRICITY</topic><topic>GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC</topic><topic>GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS</topic><topic>MACHINE TOOLS</topic><topic>MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS</topic><topic>METAL-WORKING NOT OTHERWISE PROVIDED FOR</topic><topic>PERFORMING OPERATIONS</topic><topic>PRINTED CIRCUITS</topic><topic>SEMICONDUCTOR DEVICES</topic><topic>SOLDERING OR UNSOLDERING</topic><topic>TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION</topic><topic>TECHNICAL SUBJECTS COVERED BY FORMER USPC</topic><topic>TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS</topic><topic>TRANSPORTING</topic><topic>WELDING</topic><topic>WORKING BY LASER BEAM</topic><toplevel>online_resources</toplevel><creatorcontrib>JAPP; ROBERT M</creatorcontrib><creatorcontrib>PIERSON; MARK V</creatorcontrib><creatorcontrib>DOWNES, JR.; FRANCIS J</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>JAPP; ROBERT M</au><au>PIERSON; MARK V</au><au>DOWNES, JR.; FRANCIS J</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Chip C4 assembly improvement using magnetic force and adhesive</title><date>2000-11-07</date><risdate>2000</risdate><abstract>A method, and associated structure, for adhesively coupling a chip to an organic chip carrier. The chip is attached to a top surface of the organic chip carrier by interfacing a solder bump between a C4 solder structure on the chip and a pad on a top surface of the chip carrier. The melting temperature of the solder bump is less than the melting temperature of the C4 solder structure. A block of ferrous material is placed on a top surface of the chip. A temporary or permanent stiffener of ferrous material is placed on the top surface of the chip carrier. A permanent magnet is coupled to a bottom surface of the chip carrier. Alternatively, an electromagnetic could be utilized instead of the electromagnet. Due to the permanent magnet or the electromagnet, a magnetic force on the stiffener is directed toward the magnet and substantially flattens the first surface of the chip carrier. Similarly, a magnetic force on the block is directed toward the magnet such that the electronic component and the chip carrier are held in alignment. The solder bump is reflowed at a temperature between the melting temperature of the solder bump and the melting temperature of the C4 solder structure. The reflowing reconfigures the solder bump. The magnetic force on the block frictionally clamps the reflowed solder between the C4 solder structure and the pad. The chip and carrier are cooled, resulting in the C4 solder structure being adhesively and conductively coupled to the pad.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| subjects | BASIC ELECTRIC ELEMENTS CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS MACHINE TOOLS MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS PRINTED CIRCUITS SEMICONDUCTOR DEVICES SOLDERING OR UNSOLDERING TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TRANSPORTING WELDING WORKING BY LASER BEAM |
| title | Chip C4 assembly improvement using magnetic force and adhesive |
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