Source: http://www.google.com/patents/US7192798?ie=ISO-8859-1
Timestamp: 2015-03-03 04:13:58
Document Index: 530452739

Matched Legal Cases: ['art 4', 'art 4', 'art 4', 'art 4', 'art 4', 'art 4', 'art 4', 'art 18', 'art 4', 'art 18']

Patent US7192798 - Fingerprint sensor apparatus and manufacturing method thereof - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA fingerprint sensor apparatus can provide a normal fingerprint sensor function even when a mold flash is formed. The fingerprint sensor apparatus recognizes a pattern of a fingerprint by being contacted by a finger. A semiconductor chip has a surface on which a sensor part is formed. The semiconductor...http://www.google.com/patents/US7192798?utm_source=gb-gplus-sharePatent US7192798 - Fingerprint sensor apparatus and manufacturing method thereofAdvanced Patent SearchPublication numberUS7192798 B2Publication typeGrantApplication numberUS 10/289,268Publication dateMar 20, 2007Filing dateNov 7, 2002Priority dateFeb 20, 2002Fee statusPaidAlso published asCN1202566C, CN1440060A, DE60208328D1, DE60208328T2, EP1339009A2, EP1339009A3, EP1339009B1, US20030156743Publication number10289268, 289268, US 7192798 B2, US 7192798B2, US-B2-7192798, US7192798 B2, US7192798B2InventorsAkira Okada, Hideharu Sakoda, Michio Hayakawa, Fumihiko TaniguchiOriginal AssigneeFujitsu LimitedExport CitationBiBTeX, EndNote, RefManPatent Citations (11), Non-Patent Citations (1), Referenced by (10), Classifications (19), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetFingerprint sensor apparatus and manufacturing method thereof
If the fingerprint sensor is of a so-called area type in which the sensor part 4 has a relatively large area, the remaining uncovered part can maintain the function as the sensor part since a ratio of the part covered by the mold flash is small. However, in a case of a so-called sweep-type fingerprint sensor, which reads a fingerprint by the sensor part being wiped by a finger, a width H of the sensor part 4 is very as small as 1 mm. Generally, a length L of a mold flash is 0.3 mm�0.5 mm, and a large part of the sensor part 4 may be covered by the mold flash, which results in fail in the function of the sensor part.
Even in the case where the opening 18 is formed by the spacer 20 of the above-mentioned dimension, there is a possibility that a mold flash as shown in FIG. 2 may be formed. However, as mentioned above, since the length of the mold flash is about 0.3 mm�0.5 mm from the end of the spacer, the mold flash does not reach the sensor part 4 even if the mold flash is formed, as shown in FIG. 3. Therefore, the sensor part 4 is prevented from loosing the function as a sensor part due to the mold flash 16 covering the sensor part 4.
Since the width of the semiconductor chip is about 4 mm, if the above-mentioned dimension S exceeds 1 mm, it will become impossible to carry out resin encapsulation of the electrodes of the semiconductor chip 2 formed on the same surface as the sensor part 4. It is preferable to set the above-mentioned distance S to 0.3 mm�1.0 mm based on the above-mentioned restrictions on dimensions. Here, a start point of the distance S is determined as a position corresponding to the end of the spacer 20, that is, an end of the bottom of the opening 18 when a mold flash is not formed.
In order to form the step part 18A, the spacer 20A is formed as a two-step configuration, as shown in FIG. 6. That is, the surface of the upper stage of the spacer 20A contacts the sensor part 4 and is pressed, and the surface around the upper stage is located 70 μm�150 μm below the upper stage surface. When the resin-molding is carried out using the thus-formed spacer 20A, the seal resin flows into a gap space G of 70 μm to 150 μm formed between the lower stage surface and the surface of the semiconductor chip 2, thereby forming the step part 18A as shown in FIG. 5.
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Holdings LimitedPackage having exposed integrated circuit deviceUS7566966Sep 5, 2007Jul 28, 2009Stats Chippac Ltd.Integrated circuit package-on-package system with anti-mold flash featureUS7599532 *Sep 8, 2008Oct 6, 2009Authentec, Inc.Finger sensing with enhanced mounting and associated methodsUS7632698 *May 16, 2006Dec 15, 2009Freescale Semiconductor, Inc.Integrated circuit encapsulation and method thereforUS7859068Nov 3, 2009Dec 28, 2010Freescale Semiconductor, Inc.Integrated circuit encapsulation and method thereforUS7898072Jul 11, 2008Mar 1, 2011Stats Chippac Ltd.Package stacking system with mold contamination preventionUS8143103Jan 31, 2011Mar 27, 2012Stats Chippac Ltd.Package stacking system with mold contamination prevention and method for manufacturing thereofUS8183675Nov 29, 2007May 22, 2012Stats Chippac Ltd.Integrated circuit package-on-package system with anti-mold flash feature* Cited by examinerClassifications U.S. Classification438/51, 382/124, 257/E29.324, 438/124, 257/680International ClassificationG06T1/00, H01L21/00, H01L21/56, G06K9/00, G01B7/28, A61B5/117Cooperative ClassificationH01L2224/45144, G06K9/0002, H01L2224/73265, H01L2224/48227, H01L2924/1815, H01L2224/32225, H01L2224/48091European ClassificationG06K9/00A1ALegal EventsDateCodeEventDescriptionAug 20, 2014FPAYFee paymentYear of fee payment: 8Aug 18, 2010FPAYFee paymentYear of fee payment: 4Jul 9, 2010ASAssignmentFree format text: CHANGE OF NAME;ASSIGNOR:FUJITSU MICROELECTRONICS LIMITED;REEL/FRAME:24651/744Owner name: FUJITSU SEMICONDUCTOR LIMITED,JAPANEffective date: 20100401Effective date: 20100401Free format text: CHANGE OF NAME;ASSIGNOR:FUJITSU MICROELECTRONICS LIMITED;REEL/FRAME:24651/744Owner name: FUJITSU SEMICONDUCTOR LIMITED,JAPANFree format text: CHANGE OF NAME;ASSIGNOR:FUJITSU MICROELECTRONICS LIMITED;REEL/FRAME:024651/0744Owner name: FUJITSU SEMICONDUCTOR LIMITED, JAPANDec 9, 2008ASAssignmentOwner name: FUJITSU MICROELECTRONICS LIMITED, JAPANFree format text: ASSIGNMENT OF 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