Source: http://www.freshpatents.com/-dt20091231ptan20090321910.php
Timestamp: 2013-06-19 00:59:54
Document Index: 750722912

Matched Legal Cases: ['art 128', 'art 128', 'art 128', 'art 128', 'art 118', 'art 128', 'art 138', 'art 148', 'art 118', 'arts 118', 'arts 516', 'arts 517', 'art 517', 'art 527', 'art 537', 'art 547', 'art 517', 'art 527', 'art 537', 'art 547']

Semiconductor Package, Stacked Semiconductor Package Having The Same, And A Method For Selecting One Semiconductor Chip In A Stacked Semiconductor Package n/a views for this patent on FreshPatents.comupdated 06/14/13
Semiconductor package, stacked semiconductor package having the same, and a method for selecting one semiconductor chip in a stacked semiconductor package Abstract: A semiconductor package includes a semiconductor chip having a circuit section. A first chip selection electrode passes through a first position of the semiconductor chip, and the first chip selection electrode has a first resistance and outputs a first signal. A second chip selection electrode passes through a second position of the semiconductor chip, and the second chip selection electrode has a second resistance greater than the first resistance and outputs a second signal. A signal comparison part is formed in the semiconductor chip and is electrically connected to the first and second chip selection electrodes. The signal comparison part compares the first signal applied from the first chip selection electrode to the second signal applied from the second chip selection electrode and outputs a chip selection signal to the circuit section depending upon the result of the comparison. ...
USPTO Applicaton #: #20090321910 - Class: 257686 (USPTO) - 12/31/09 - Class 257 Related Terms: Ares The Patent Description & Claims data below is from USPTO Patent Application 20090321910, Semiconductor package, stacked semiconductor package having the same, and a method for selecting one semiconductor chip in a stacked semiconductor package.
The present application claims priority to Korean patent application number 10-2008-0062912 filed on Jun. 30, 2008, which is incorporated herein by reference in its entirety.
The present invention relates to a semiconductor package, a stacked semiconductor package having the same, and a method for selecting one semiconductor chip in the stacked semiconductor package.
Embodiments of the present invention are include a semiconductor package having a structure suitable for a stacked semiconductor package.
The voltage divider further includes an additional grounded resistor connected in series with the resistors, and the second chip selection electrodes have a grounded re-distribution line which is electrically connected to the second chip selection electrodes. The respective switching sections are connected in parallel to the respective nodes and the respective first chip selection electrodes.
FIG. 1 is a cross-sectional view showing a semiconductor package in accordance with one embodiment of the present invention.
Hereafter, a semiconductor package, a stacked semiconductor package having the same, and a method for selecting one semiconductor chip of the stacked semiconductor package according to specific embodiments of the present invention will be described with reference to the accompanying drawings. It is to be noted that the present invention is not limited to the following embodiments, and a person having ordinary knowledge in the art will appreciate that the present invention can be realized in a variety of different ways without departing from the technical concept of the present invention.
In one embodiment of the present invention, the semiconductor chip 10 is shaped as a rectangular hexahedron and includes a circuit section 2 and bonding pads (not shown). The circuit section 2 has, for example, a data storage part (not shown) for storing data and a data processing part (not shown) for processing data.
The bonding pads are electrically connected to the circuit section 2 and can be located on the center portion or adjacent to the edges of the upper surface of the semiconductor chip 10. The first chip selection electrode 20 passes through the upper surface and the lower surface of the semiconductor chip 10 at a first position of the semiconductor chip 10. In the present embodiment, the first chip selection electrode 20 has an electrical first resistance R1.
The second chip selection electrode 30 passes through the upper surface and the lower surface of the semiconductor chip 10 at a second position of the semiconductor chip 10. In the present embodiment, the second chip selection electrode 30 has an electrical second resistance R2 greater than the first resistance R1. Meanwhile, a re-distribution line 4 is formed on the upper surface of the semiconductor chip 10 such that the re-distribution line 4 is grounded and electrically connected to the second chip selection electrode 30.
In the present embodiment, the first chip selection electrode 122 of the second semiconductor chip 120 passes through the upper surface and the lower surface (which is opposite the upper surface) of the second semiconductor chip 120 at a first position of the second semiconductor chip 120. As a result, the first chip selection electrode 122 of the second semiconductor chip 120 is electrically connected in series to the first chip selection electrode 112 of the first semiconductor chip 110.
The signal comparison part 128, which is formed in the circuit section 126 of the second semiconductor chip 120, is electrically connected to the first chip selection electrode 122 and the second chip selection electrode 124. The signal comparison part 128 outputs a chip selection signal CSS2 to the circuit section 126 of the second semiconductor chip 120 depending upon the difference in the voltage level between the signals received from the first and second chip selection electrodes 122 and 124. For example, a first signal Vs received from the first chip selection electrode 122 is applied to the signal comparison part 128. A second signal VF2 received from the second chip selection electrode 124 of the second semiconductor chip 120 is also applied to the signal comparison part 128 of the second semiconductor chip 120.
First, when assuming that the respective resistors Ra, Rb, Rc, Rd of the voltage divider 310 and the additional resistor Rt1 have resistance values equivalent to the respective second chip selection electrodes 114, 124, 134, 144 of the first through fourth semiconductor chips 110, 120, 130 and 140 and the re-distribution line 149; if, for example, a DC voltage Vdc of 5[V] (5[V]×5/5) is applied to the resistor Rd and the second chip selection electrode 114 via the power supply section 320: 4[V] (5[V]×4/5) is applied to the node Nd of the voltage divider 310; 3[V] (5[V]×3/5) is applied to the node Nc; 2[V] (5[V]×2/5) is applied to the node Nb; and 1[V] (5[V]×1/5) is applied to the node Na.
The DC voltage Vdc of 5[V] is also applied to the second chip selection electrode 114 of the first semiconductor chip 110, and 4[V] (5[V]×4/5) is applied to the node N0. By the node N0, the second signal VF1 having the level of 4[V] is applied to the signal comparison part 118 of the first semiconductor chip 110.
3[V] (5[V]×3/5) is applied to the node N1. By the node N1, the second signal VF2 having the level of 3[V] is applied to the signal comparison part 128 of the second semiconductor chip 120.
2[V] (5[V]×2/5) is applied to the node N2. By the node N2, the second signal VF3 having the level of 2[V] is applied to the signal comparison part 138 of the third semiconductor chip 130.
1[V] (5[V]×1/5) is applied to the node N3. By the node N3, the second signal VF4 having the level of 1[V] is applied to the signal comparison part 148 of the fourth semiconductor chip 140.
As a result, the chip selection signal CSS1 is outputted to the circuit section 116 from the signal comparison part 118 included in the first semiconductor chip 110 (which has the least voltage level difference, approximately O[V]) among the signal comparison parts 118, 128, 138, and 148 included in the first through fourth semiconductor chips 110, 120, 130, and 140 respectively.
First, assuming that the resistance of the resistor Ra of the voltage divider 610 is, for example, 1Ω, the resistance of the resistor Rb is, for example, 2Ω, the resistance of the resistor Rc is, for example, 6Ω, the resistance of the resistor Rd is, for example, 0Ω, the resistance of the additional resistor Rt1 is, for example, 4Ω: when a DC voltage of 12[V] is supplied to the resistor Rd from the power supply section 620, the first signals Vr1˜Vr4 outputted from the respective reference voltage supply parts 516, 526, 536, and 546 should be 2.4[V]. Thus, the first signals Vr1˜Vr4 of 2.4[V] are inputted to the respective signal comparison parts 517, 527, 537, and 547 of the first through fourth semiconductor chips 510, 520, 530, and 540.
As 3[V] is applied to the chip selection electrode 513, 2.4[V] (3[V]×4/5) is applied to the signal comparison part 517 from the node N0. As 3[V] is applied to the chip selection electrode 513, 1.8[V] (3[V]×3/5) is applied to the signal comparison part 527 from the node N1. As 3[V] is applied to the chip selection electrode 513, 1.2[V] (3[V]×2/5) is applied to the signal comparison part 537 from the node N2. As 3[V] is applied to the chip selection electrode 513, 0.6[V] (3[V]×1/5) is applied to the signal comparison part 547 from the node N3.
As a further example, if the driving signal Dv4 is outputted from the driving signal generation section 640 in order to select the fourth semiconductor chip 540, the fourth switching section 638 is turned on, and the voltage of 12[V] outputted from the node Nd is inputted to the chip selection electrode 513 of the first semiconductor chip 510.
As 12[V] is applied to the chip selection electrode 513, 9.6[V] (12[V]×4/5) is applied to the signal comparison part 517 from the node N0. As 12[V] is applied to the chip selection electrode 513, 7.2[V] (12[V]×3/5) is applied to the signal comparison part 527 from the node N1. As 12[V] is applied to the chip selection electrode 513, 4.8[V] (12[V]×2/5) is applied to the signal comparison part 537 from the node N2. As 12[V] is applied to the chip selection electrode 513, 2.4[V] (12[V]×1/5) is applied to the signal comparison part 547 from the node N3.
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