Active solid-state devices (e.g. – transistors – solid-state diode – Lead frame – With heat sink means
Reexamination Certificate
2011-06-14
2011-06-14
Cao, Phat X (Department: 2814)
Active solid-state devices (e.g., transistors, solid-state diode
Lead frame
With heat sink means
C257S676000
Reexamination Certificate
active
07960818
ABSTRACT:
In accordance with the present invention, there is provided a punch quad flat no leads (QFN) semiconductor package including a leadframe wherein the leads of the leadframe are selectively half-etched so that only one or more prescribed leads may be electrically connected to a conformal shield applied to the package body of the semiconductor package. The conformal shield may be electrically connected to the exposed lead(s) alone, or in combination with one or more tie bars of the leadframe. In one embodiment, outer end portions of the top surfaces of the leads of the semiconductor package are alternately exposed and non-exposed, with the non-exposed leads including a top side half-etch which causes the same to be effectively covered by the package body of the semiconductor package.
REFERENCES:
patent: 2596993 (1952-05-01), Gookin
patent: 3435815 (1969-04-01), Forcier
patent: 3734660 (1973-05-01), Davies et al.
patent: 3838984 (1974-10-01), Crane et al.
patent: 4054238 (1977-10-01), Lloyd et al.
patent: 4189342 (1980-02-01), Kock
patent: 4221925 (1980-09-01), Finley et al.
patent: 4258381 (1981-03-01), Inaba
patent: 4289922 (1981-09-01), Devlin
patent: 4301464 (1981-11-01), Otsuki et al.
patent: 4332537 (1982-06-01), Slepcevic
patent: 4417266 (1983-11-01), Grabbe
patent: 4451224 (1984-05-01), Harding
patent: 4530152 (1985-07-01), Roche et al.
patent: 4541003 (1985-09-01), Otsuka et al.
patent: 4646710 (1987-03-01), Schmid et al.
patent: 4707724 (1987-11-01), Suzuki et al.
patent: 4727633 (1988-03-01), Herrick
patent: 4737839 (1988-04-01), Burt
patent: 4756080 (1988-07-01), Thorpe, Jr. et al.
patent: 4812896 (1989-03-01), Rothgery et al.
patent: 4862245 (1989-08-01), Pashby et al.
patent: 4862246 (1989-08-01), Masuda et al.
patent: 4907067 (1990-03-01), Derryberry
patent: 4920074 (1990-04-01), Shimizu et al.
patent: 4925024 (1990-05-01), Ellenberger et al.
patent: 4935803 (1990-06-01), Kalfus et al.
patent: 4942454 (1990-07-01), Mori et al.
patent: 4987475 (1991-01-01), Sclesinger et al.
patent: 5018003 (1991-05-01), Yasunaga
patent: 5029386 (1991-07-01), Chao et al.
patent: 5041902 (1991-08-01), McShane
patent: 5057900 (1991-10-01), Yamazaki
patent: 5059379 (1991-10-01), Tsutsumi et al.
patent: 5065223 (1991-11-01), Matsuki et al.
patent: 5070039 (1991-12-01), Johnson et al.
patent: 5087961 (1992-02-01), Long et al.
patent: 5091341 (1992-02-01), Asada et al.
patent: 5096852 (1992-03-01), Hobson et al.
patent: 5118298 (1992-06-01), Murphy
patent: 5122860 (1992-06-01), Kichuchi et al.
patent: 5134773 (1992-08-01), LeMaire et al.
patent: 5151039 (1992-09-01), Murphy
patent: 5157475 (1992-10-01), Yamaguchi
patent: 5157480 (1992-10-01), McShane et al.
patent: 5166772 (1992-11-01), Soldner et al.
patent: 5168368 (1992-12-01), Gow, 3rd et al.
patent: 5172213 (1992-12-01), Zimmerman
patent: 5172214 (1992-12-01), Casto
patent: 5175060 (1992-12-01), Enomoto et al.
patent: 5200362 (1993-04-01), Lin et al.
patent: 5200809 (1993-04-01), Kwon
patent: 5214845 (1993-06-01), King et al.
patent: 5216278 (1993-06-01), Lin et al.
patent: 5218231 (1993-06-01), Kudo
patent: 5221642 (1993-06-01), Burns
patent: 5250841 (1993-10-01), Sloan et al.
patent: 5252853 (1993-10-01), Michii
patent: 5258094 (1993-11-01), Furui et al.
patent: 5266834 (1993-11-01), Nishi et al.
patent: 5273938 (1993-12-01), Lin et al.
patent: 5277972 (1994-01-01), Sakumoto et al.
patent: 5278446 (1994-01-01), Nagaraj et al.
patent: 5279029 (1994-01-01), Burns
patent: 5281849 (1994-01-01), Singh Deo et al.
patent: 5285352 (1994-02-01), Pastore et al.
patent: 5294897 (1994-03-01), Notani et al.
patent: 5327008 (1994-07-01), Djennas et al.
patent: 5332864 (1994-07-01), Liang et al.
patent: 5335771 (1994-08-01), Murphy
patent: 5336931 (1994-08-01), Juskey et al.
patent: 5343076 (1994-08-01), Katayama et al.
patent: 5358905 (1994-10-01), Chiu
patent: 5365106 (1994-11-01), Watanabe
patent: 5381042 (1995-01-01), Lerner et al.
patent: 5391439 (1995-02-01), Tomita et al.
patent: 5406124 (1995-04-01), Morita et al.
patent: 5410180 (1995-04-01), Fujii et al.
patent: 5414299 (1995-05-01), Wang et al.
patent: 5416358 (1995-05-01), Ochi et al.
patent: 5417905 (1995-05-01), LeMaire et al.
patent: 5424576 (1995-06-01), Djennas et al.
patent: 5428248 (1995-06-01), Cha
patent: 5435057 (1995-07-01), Bindra et al.
patent: 5444301 (1995-08-01), Song et al.
patent: 5452511 (1995-09-01), Chang
patent: 5454905 (1995-10-01), Fogelson
patent: 5467032 (1995-11-01), Lee
patent: 5468999 (1995-11-01), Lin et al.
patent: 5473191 (1995-12-01), Tanaka
patent: 5474958 (1995-12-01), Djennas et al.
patent: 5484274 (1996-01-01), Neu
patent: 5490271 (1996-02-01), Elliott et al.
patent: 5493151 (1996-02-01), Asada et al.
patent: 5508556 (1996-04-01), Lin
patent: 5517056 (1996-05-01), Bigler et al.
patent: 5521429 (1996-05-01), Aono et al.
patent: 5528076 (1996-06-01), Pavio
patent: 5534467 (1996-07-01), Rostoker
patent: 5539251 (1996-07-01), Iverson et al.
patent: 5543657 (1996-08-01), Diffenderfer et al.
patent: 5544412 (1996-08-01), Romero et al.
patent: 5545923 (1996-08-01), Barber
patent: 5557142 (1996-09-01), Gilmore et al.
patent: 5581122 (1996-12-01), Chao et al.
patent: 5592019 (1997-01-01), Ueda et al.
patent: 5592025 (1997-01-01), Clark et al.
patent: 5594274 (1997-01-01), Suetaki
patent: 5595934 (1997-01-01), Kim
patent: 5604376 (1997-02-01), Hamburgen et al.
patent: 5608265 (1997-03-01), Kitano et al.
patent: 5608267 (1997-03-01), Mahulikar et al.
patent: 5614694 (1997-03-01), Gorenz, Jr.
patent: 5625222 (1997-04-01), Yoneda et al.
patent: 5633528 (1997-05-01), Abbott et al.
patent: 5637922 (1997-06-01), Fillion et al.
patent: 5639990 (1997-06-01), Nishihara et al.
patent: 5640047 (1997-06-01), Nakashima
patent: 5641997 (1997-06-01), Ohta et al.
patent: 5643433 (1997-07-01), Fukase et al.
patent: 5644169 (1997-07-01), Chun
patent: 5646831 (1997-07-01), Manteghi
patent: 5650663 (1997-07-01), Parthasaranthi
patent: 5656864 (1997-08-01), Mitsue et al.
patent: 5661088 (1997-08-01), Tessier et al.
patent: 5665996 (1997-09-01), Williams et al.
patent: 5673479 (1997-10-01), Hawthorne
patent: 5683806 (1997-11-01), Sakumoto et al.
patent: 5683943 (1997-11-01), Yamada
patent: 5689135 (1997-11-01), Ball
patent: 5694300 (1997-12-01), Mattei et al.
patent: 5696666 (1997-12-01), Miles et al.
patent: 5701034 (1997-12-01), Marrs
patent: 5703407 (1997-12-01), Hori
patent: 5710064 (1998-01-01), Song et al.
patent: 5723899 (1998-03-01), Shin
patent: 5724233 (1998-03-01), Honda et al.
patent: 5726493 (1998-03-01), Yamashita
patent: 5736432 (1998-04-01), Mackessy
patent: 5745984 (1998-05-01), Cole, Jr. et al.
patent: 5753532 (1998-05-01), Sim
patent: 5753977 (1998-05-01), Kusaka et al.
patent: 5766972 (1998-06-01), Takahashi et al.
patent: 5767566 (1998-06-01), Suda
patent: 5770888 (1998-06-01), Song et al.
patent: 5776798 (1998-07-01), Quan et al.
patent: 5783861 (1998-07-01), Son
patent: 5801440 (1998-09-01), Chu et al.
patent: 5814877 (1998-09-01), Diffenderfer et al.
patent: 5814881 (1998-09-01), Alagaratnam et al.
patent: 5814883 (1998-09-01), Sawai et al.
patent: 5814884 (1998-09-01), Davies et al.
patent: 5817540 (1998-10-01), Wark
patent: 5818105 (1998-10-01), Kouda
patent: 5821457 (1998-10-01), Mosley et al.
patent: 5821615 (1998-10-01), Lee
patent: 5834830 (1998-11-01), Cho
patent: 5835988 (1998-11-01), Ishii
patent: 5844306 (1998-12-01), Fujita et al.
patent: 5854511 (1998-12-01), Shin et al.
patent: 5854512 (1998-12-01), Manteghi
patent: 5856911 (1999-01-01), Riley
patent: 5859471 (1999-01-01), Kuraishi et al.
patent: 5866939 (1999-02-01), Shin et al.
patent: 5866942 (1999-02-01), Suzuki et al.
patent: 5871782 (1999-02-01), Choi
patent: 5874784 (1999-02-01), Aoki et al.
patent: 5877043 (1999-03-01), Alcoe et al.
patent: 5886397 (1999-03-01), Ewer
patent: 5907271 (1999-05-01), Hirano et al.
patent: 5973935 (1999-10-01), Schoenfeld et al.
patent: 5977630 (1999-11-01), Woodworth et al.
patent: RE36773 (2000-07-01), Nomi et al.
patent: 6107679 (2000-08-01), Noguchi
patent: 6136131 (2000-10-01), Sosnowski
patent: 6143981 (2000-11-01), Glenn
patent: 6150709 (2000-11-01),
Davis Terry W.
Son Sun Jin
Amkor Technology Inc.
Cao Phat X
Stetina Brunda Garred & Brucker
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