Patent Publication Number: US-2023142313-A1

Title: Solid state drive apparatus including electrostatic prevention structure

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a divisional of U.S. patent application Ser. No. 16/299,298, filed on Mar. 12, 2019, which claims the benefit of Korean Patent Application No. 10-2018-0103028, filed on Aug. 30, 2018, in the Korean Intellectual Property Office, the disclosures of each of which are incorporated herein in their entirety by reference. 
     BACKGROUND 
     Example embodiments of the inventive concepts relate to a solid state drive apparatus. For example, at least some example embodiments relate to a solid state drive apparatus including an electrostatic prevention structure. 
     When a solid state drive apparatus is used as a storage apparatus, large-capacity data may be input and output at a high speed and thus there is an increased demand for the solid state drive apparatus. As a data processing speed of the solid state drive apparatus increases, due to external electrostatic discharge, noise of a certain frequency band may be received inside the solid state drive apparatus. When the noise is received, soft errors or soft fails, for example, bit errors of one bit to several bits may be generated when the solid state drive apparatus processes data. 
     SUMMARY 
     Example embodiments of the inventive concepts provide a solid state drive apparatus including an electrostatic prevention structure capable of reducing (or, alternatively, preventing) soft errors from being generated by external electrostatic discharge. 
     According to an example embodiment of the inventive concepts, there is provided a solid state drive apparatus including a case including a base and side walls, the side walls extending perpendicular to the base along a circumference of the base; an electrostatic prevention structure protruding from at least a partial surface of the base, the electrostatic prevention structure including a metal pillar and an electrostatic absorbing member, the metal pillar being spaced apart from the side walls of the case, and the electrostatic absorbing member being on at least a partial surface of the metal pillar; a package substrate module on the electrostatic prevention structure in the case; and a cover covering the case and the package substrate module. 
     According to an example embodiment of the inventive concepts, there is provided a solid state drive apparatus including a case including a base and side walls, the side walls extending perpendicular to the base along a circumference of the base; an electrostatic prevention structure separated from the side walls by a distance, the electrostatic prevention structure including a metal pillar and an electrostatic absorbing member, the metal pillar including a plurality of sub-pillars having holes therein, and the electrostatic absorbing member being on the metal pillar and the holes; a package substrate module on a plurality of substrate mounting units in the side walls in the case and on the electrostatic prevention structure; and a cover covering the case and the package substrate module. 
     According to an example embodiment of the inventive concepts, there is provided a solid state drive apparatus including a case including a base and side walls, the side walls extending perpendicular to the base along a circumference of the base; an electrostatic prevention structure separated from the side walls by a distance, the electrostatic prevention structure including a metal pillar and an electrostatic absorbing member, the metal pillar including a plurality of sub-pillars and a sub-connection pillar, the sub-connection pillar connecting a portion of side walls of the sub-pillars, holes in at least one of the sub-pillars and the sub-connection pillar, and the electrostatic absorbing member being on the metal pillar and the holes; a package substrate module on a plurality of substrate mounting units in the side walls in the case and on the electrostatic prevention structure; and a cover covering the case and the package substrate module. 
     The solid state drive apparatus according to example embodiments of the inventive concepts includes the electrostatic prevention structure including the metal pillar in the case close to the semiconductor chip mounted on the package substrate module and the electrostatic absorbing member on the metal pillar. Therefore, the solid state drive apparatus according to example embodiments of the inventive concepts may reduce (or, alternatively, prevent) soft errors, for example, bit errors from being generated by external electrostatic discharge. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Example embodiments of the inventive concepts will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings in which: 
         FIG.  1    is a perspective view of a solid state drive apparatus according to an example embodiment of the inventive concepts; 
         FIG.  2    is a perspective view of a solid state drive apparatus including a case and an electrostatic prevention structure according to an example embodiment of the inventive concepts; 
         FIG.  3    is a perspective view of a rear surface of the case of  FIG.  2   ; 
         FIG.  4    is a cross-sectional view taken along the line IV-IV′ of  FIG.  2   ; 
         FIG.  5    is a perspective view illustrating a package substrate module of a solid state drive apparatus according to an example embodiment of the inventive concepts; 
         FIGS.  6  and  7    are a rear view and a side view of a case of a solid state drive apparatus according to an example embodiment of the inventive concepts; 
         FIG.  8    is a plan view of a case of a solid state drive apparatus according to an example embodiment of the inventive concepts; 
         FIGS.  9  and  10    are side views of a case of a solid state drive apparatus according to an example embodiment of the inventive concepts; 
         FIG.  11    is a cross-sectional view taken along the line XI-XI′ of  FIG.  8   ; 
         FIG.  12    is a perspective view of a solid state drive apparatus including a case and an electrostatic prevention structure according to an example embodiment of the inventive concepts; 
         FIG.  13    is a perspective view of a solid state drive apparatus including a case and an electrostatic prevention structure according to an example embodiment of the inventive concepts; 
         FIG.  14    is an exploded perspective view of a solid state drive apparatus including a case and an electrostatic prevention structure according to an example embodiment of the inventive concepts; 
         FIG.  15    is a block diagram of a solid state drive apparatus according to an example embodiment of the inventive concepts; and 
         FIG.  16    is a block diagram of a system according to an example embodiment of the inventive concepts. 
     
    
    
     DETAILED DESCRIPTION 
     Example embodiments of the inventive concepts will be described in detail with reference to the accompanying drawings. The example embodiments of the inventive concepts may be implemented by a certain one or a combination of one or more of the example embodiments. Therefore, the spirit of the example embodiments of the inventive concepts are not interpreted only by one example embodiment. The accompanying drawings are not necessarily illustrated at a certain ratio. In some example embodiments, in order to clearly show characteristics of the example embodiments, a ratio of at least a part of structures illustrated in the drawing may be exaggerated. 
     In a solid state drive apparatus, a base substrate or a semiconductor chip that forms a package substrate module may be severely damaged by electrical stress of a high voltage, which is caused by external electrostatic discharge so that hard fails may be generated in hardware. In the solid state drive apparatus, as the quality of parts improves, hard fails caused by external electrostatic discharge are gradually reduced. 
     However, as a data processing speed of the solid state drive apparatus increases, in the solid state drive apparatus, due to electrical stress of a high voltage, which is caused by external electrostatic discharge, noise of a certain frequency band may be received from an electronic system to the inside of the solid state drive apparatus. When the noise is received, soft errors or soft fails in which software is damaged, for example, bit errors of one bit to several bits may be generated when the solid state drive apparatus processes data. 
     In one or more example embodiments of the inventive concepts, a solid state drive apparatus may be provided in order to reduce (or, alternatively, solve) soft errors (or soft fails) caused by electrostatic discharge. 
       FIG.  1    is a perspective view of a solid state drive apparatus according to an example embodiment of the inventive concepts. 
     Referring to  FIG.  1   , a solid state drive apparatus  500  includes a case  100 , an electrostatic prevention structure ( 206  of  FIG.  2   ), a package substrate module  300 , and a cover  400 . Screw holes  116  and  118  that may mechanically contact an external apparatus may be positioned in portions connected to respective ones of the pair of side walls  104  of the case  100 . 
     The package substrate module  300  is mounted in the case  100  and an external connector  310  may be positioned outside the package substrate module  300 . The external connector  310  may include a terminal  312  and a body  314 . A shape of the external connector  310  may vary and the example embodiments of the inventive concepts are not limited thereto. 
     The external connector  310  connects the solid state drive apparatus  500  to an external host and may transmit and receive a signal and/or may receive power. The external connector  310  may include, for example, a connector configured to be connected to the external apparatus by a method in accordance with a parallel advanced technology attachment (PATA) standard, a serial advanced technology attachment (SATA) standard, a small computer system interface (SCSI) standard, or a program controlled interrupt (PCI) express (PCIe) standard. 
     Here, the SATA standard embraces all SATA-based standards such as SATA-2, SATA-3, external SATA (e-SATA) as well as SATA-1. The PCIe standard embraces all PCIe-based standards such as PCIe 2.0, PCIe 2.1, PCIe 3.0, and PCIe 4.0 as well as PCIe 1.0. The SCSI standard embraces all SCSI-based standards such as parallel SCSI, serial combination SA-SCSI (SAS), and iSCSI. In some embodiments, the external connector  310  may be a connector configured to support an M2 interface, an mSATA interface, or a 2.5″ interface. 
     The solid state drive apparatus  500  may include the cover  400  that covers the case  100  and the package substrate module  300 . Configurations of the case  100 , the electrostatic prevention structure ( 206  of  FIG.  2   ), and the package substrate module  300  will be described in more detail later. 
       FIG.  2    is a perspective view of a solid state drive apparatus including a case and an electrostatic prevention structure according to an example embodiment of the inventive concepts.  FIG.  3    is a perspective view of a rear surface of the case of  FIG.  2   .  FIG.  4    is a cross-sectional view taken along the line IV-IV′ of  FIG.  2   , additionally illustrating the package substrate module  300  of  FIG.  1   . 
     Referring to  FIGS.  2 - 4   , the solid state drive apparatus  500  may include a base  102  and the case  100  including side walls  104 ,  108 , and  110  extending upward along a circumference of the base  102 . The base  102  may include a surface  102   a  and a rear surface  102   b.  At an edge of the rear surface  102   b  of the base  102 , a buffer  106  capable of reducing (or, alternatively, preventing) the case  100  from being damaged by external shock may be provided. 
     The side walls  104  may be left and right side walls. The side walls  108  and  110  may be front and rear side walls. Heat discharge holes  112  that receive air and may discharge heat generated by the package substrate module  300  may be provided in the front side walls  108 . A recess  114  may be formed in the rear side wall  110  so that an external connector may be settled and opened. 
     As described above, the screw holes  116  and  118  that may mechanically contact the external apparatus may be positioned in portions connected to the side walls  104  of the case  100  and the side walls  104  of the case  100 . The case  100  may be formed of a metal, for example, aluminum (Al). The case  100  may be manufactured by a casting method by using a metal, for example, Al. 
     The solid state drive apparatus  500  may include an electrostatic prevention structure  206  provided on at least a partial surface of the base  102 . The electrostatic prevention structure  206  may be spaced apart from the side walls  104 ,  108 , and  110 . The electrostatic prevention structure  206  may be adjacent to a space  122  around the side walls  104 ,  108 , and  110  of the case  100 . The electrostatic prevention structure  206  may be spaced apart from the side walls  104 ,  108 , and  110  by the space  122  around the side walls  104 ,  108 , and  110  of the case  100 . 
     The electrostatic prevention structure  206  may include a metal pillar  202  to protrude from at least a partial surface of the base  102  and an electrostatic absorbing member  204  on at least a partial surface of the metal pillar  202 . The metal pillar  202  may be a square pillar member protruding from the base  102 . The electrostatic absorbing member  204  may be formed of a magnetic material, for example, a ferrite material. The electrostatic absorbing member  204  may absorb static electricity that permeates from the outside of the case  100 . 
     A metal plate may be used instead of the metal pillar  202 . A cross-section of the metal pillar  202  may be square or polygonal. An upper surface of the metal pillar  202  may be a planar surface. However, example embodiments are not limited thereto and a case in which the upper surface of the metal pillar  202  is a non-planar surface may be included in the scope of the inventive concepts. In an example embodiment, the metal pillar  202  may be a heat dissipation member for dissipating heat generated by a package substrate module ( 300  of  FIG.  4   ) to the outside. 
     In an example embodiment, the metal pillar  202  that forms the electrostatic prevention structure  206  may be integrated with the case  100 . In an example embodiment, the metal pillar  202  that forms the electrostatic prevention structure  206  may be separate from the case  100 . The metal pillar  202  may be formed of a metal, for example, Al, like the case  100 . The metal pillar  202  may be manufactured by a casting method by using a metal, for example, Al. 
     A height T 2  of the metal pillar  202  may be less than a height T 1  of the case  100 . A distance between the electrostatic absorbing member  204  mounted on the metal pillar  202  and first and second semiconductor chips  304  and  306  may be reduced by controlling the height T 2  of the metal pillar  202 . By doing so, it is possible to reduce (or, alternatively, prevent) soft errors of the first and second semiconductor chips  304  and  306  from being generated by external static electricity. 
     The metal pillar  202  may be divided into sub-pillars  202   a,    202   b,  and  202   c.  The sub-pillars  202   a,    202   b,  and  202   c  may be connected to each other. Therefore, the sub-pillar  202   b  may be referred to as a sub-connection pillar for connecting partial side walls of the sub-pillars  202   a  and  202   c.  The space  122  may be provided by the sub-connection pillar  202   b  between the sub-pillars  202   a  and  202   c.    
     The sub-pillars  202   a,    202   b,  and  202   c  may have various shapes or forms. When the sub-pillars  202   a,    202   b,  and  202   c  may have various shapes or forms, a configuration of the electrostatic absorbing member  204  mounted on the sub-pillars  202   a,    202   b,  and  202   c  varies, and thus, the soft errors of the first and second semiconductor chips  304  and  306  may be reduced (or, alternatively, prevented) from being generated by external static electricity. 
     In the solid state drive apparatus  500 , heat transmitting members  208  are provided on the electrostatic absorbing member  204 . The heat transmitting members  208  spaced apart from each other may be attached onto the electrostatic absorbing member  204 . The heat transmitting members  208  spaced apart from each other and having small areas are attached onto the electrostatic absorbing member  204  having a large area so that a heat transmitting characteristic may improve. The heat transmitting member  208  may be formed of silicon resin or silicon rubber. The heat transmitting member  208  is provided as occasion demands or may be omitted. 
     In the solid state drive apparatus  500 , the package substrate module  300  is mounted on the electrostatic prevention structure  206  and the heat transmitting member  208  in the case  100 . The package substrate module  300  may be mounted on a substrate mounting unit  120  provided in the case  100 . The package substrate module  300  may include a package base substrate  302  and the first and second semiconductor chips  304  and  306  on a lower surface of the package base substrate  302 . 
     In  FIG.  4   , it is illustrated that the first and second semiconductor chips  304  and  306  are mounted on the lower surface of the package base substrate  302 . However, another semiconductor chip may be mounted on an upper surface of the package base substrate  302 . The first and second semiconductor chips  304  and  306  may be memory devices or non-memory devices. An active or passive device  308  may be mounted on the lower surface of the package base substrate  302 . An external connector  310  that may be electrically connected to an external host (device) may be provided at a side surface of the package base substrate  302 . 
     The metal pillar  202  of the solid state drive apparatus  500  protrudes from a partial surface of the base  102 , is spaced apart from the side walls  104 , and is adjacent to the space  122 . Therefore, the solid state drive apparatus  500  may increase a radiation distance and a conduction distance of static electricity (or an electro-magnetic wave) that permeates from the outside. The solid state drive apparatus  500  may reduce (or, alternatively, prevent) the first and second semiconductor chips  304  and  306  mounted in the package substrate module  300  from being radiation damaged and conduction damaged by static electricity (or an electro -magnetic wave) permeating from the outside. 
     The solid state drive apparatus  500  may reduce (or, alternatively, prevent) the first and second semiconductor chips  304  and  306  mounted in the package substrate module  300  from being radiation damaged and conduction damaged by static electricity permeating from the outside due to the space  122  between the sub-pillars  202   a  and  202   c,  which is provided by the sub-pillar  202   b.    
     Furthermore, the solid state drive apparatus  500  incudes the electrostatic absorbing member  204  so that static electricity (or an electro-magnetic wave) permeating from the outside of the case  100  may be absorbed. The solid state drive apparatus  500  may reduce (or, alternatively, prevent) the first and second semiconductor chips  304  and  306  mounted in the package substrate module  300  from being radiation damaged and conduction damaged by static electricity permeating from the outside. 
     Hereinafter, drawings for describing components of the solid state drive apparatus  500  in more detail are provided. 
       FIG.  5    is a perspective view illustrating a package substrate module of a solid state drive apparatus according to an example embodiment of the inventive concepts. 
     Referring to  FIG.  5   , the package substrate module  300  of  FIG.  5    may be applied to the solid state drive apparatus ( 500  of  FIG.  1   ). The package substrate module  300  may include the package base substrate  302 , the first and second semiconductor chips  304  and  306 , and a controller chip  316  that are attached to one side of the package base substrate  302 . 
     The package base substrate  302  may be a printed circuit board (PCB). For example, the package base substrate  302  may be a one-sided PCB or a double-sided PCB. The package base substrate  302  may be a multi-layer PCB. 
     The package base substrate  302  may include a substrate base formed of at least one material selected from phenol resin, epoxy resin, and polyimide. The substrate base may be formed of at least one material selected from phenol resin, epoxy resin, and polyimide. The substrate base may include at least one material selected from, for example, frame retardant 4 (FR4), tetrafunctional epoxy, polyphenylene ether, epoxy/polyphenylene oxide, bismaleimide triazine (BT), thermount, cyanate ester, polyimide, and liquid crystal (LC) polymer. 
     The package base substrate  302  may have wiring patterns on an upper surface and a lower surface of the substrate base. In some example embodiments, when the substrate base is formed of a plurality of layers, the wiring patterns may be formed between the plurality of layers formed by the substrate base. In the substrate base of the package base substrate  302 , a conductive via for connecting the wiring patterns may be formed. The conductive via passes through all or a part of the substrate base and may electrically connect the wiring patterns. The wiring patterns and/or the conductive via may be formed of copper (Cu), nickel (Ni), stainless steel, or beryllium CU. 
     Solder resist layers that cover at least parts of the wiring patterns arranged on the upper surface and the lower surface of the substrate base may be formed on an upper surface and a lower surface of the package base substrate  302 . Among the wiring patterns arranged on the upper surface and the lower surface of the substrate base, parts that are not covered with the solder resist layers may be used as pads electrically connected to the first semiconductor chips  304 , the second semiconductor chips  306 , the controller chip  316 , an active element or a passive element. 
     Each of the first and second semiconductor chips  304  and  306 , and the controller chip  316  may include a semiconductor substrate. The semiconductor substrate may include, for example, silicon (Si). Alternatively, the semiconductor substrate may include a semiconductor element such as germanium (Ge) or a compound semiconductor such as silicon carbide (SiC), gallium arsenide (GaAs), indium arsenide (InAs), and indium phosphide (InP). The semiconductor substrate may have an active surface and an inactive surface opposite to the active surface. In each of the first semiconductor chips  304 , the second semiconductor chips  306 , and the controller chip  316 , a semiconductor device including a plurality of various kinds of individual devices may be formed on the active surface of the semiconductor substrate. 
     Each of the first semiconductor chips  304  may be a non-volatile memory device. The non-volatile memory device may be, for example, flash memory, phase-change random access memory (RAM) (PRAM), resistive RAM (RRAM), ferroelectric RAM (FeRAM), or solid magnetic RAM (MRAM). However, example embodiments of the inventive concepts are not limited thereto. The flash memory may be, for example, NAND flash memory. The flash memory may be, for example, V-NAND flash memory. The non-volatile memory device may be formed of one semiconductor die or may be formed of several stacked semiconductor dies. 
     Each of the second semiconductor chips  306  may be a volatile memory device. The volatile memory device may be, for example, dynamic RAM (DRAM), static RAM (SRAM), synchronous dynamic RAM (SDRAM), double data rate (DDR) RAM, or rambus dynamic (RD)RAM. However, example embodiments of the inventive concepts are not limited thereto. The volatile memory device provides a cache function of storing data frequently used when an external host accesses the solid state drive apparatus ( 500  of  FIG.  1   ) and may scale access-time and data-transfer performance so as to fit process performance of the external host connected to the solid state drive apparatus  500 . 
     The controller chip  316  may control the first semiconductor chips  304  and the second semiconductor chips  306 . A controller may be mounted in the controller chip  316 . The controller may control access to data stored in the non-volatile memory device. That is, the controller may control a write/read operation of the non-volatile memory device, for example, the flash memory in accordance with a control command of the external host. The controller may be formed of an additional control semiconductor chip such as an application specific integrated circuit (ASIC). The controller may be designed to be automatically executed by an operation system of the external host, for example, when the solid state drive apparatus  500  is connected to the external host. The controller may provide a standard protocol such as parallel advanced technology attachment (PATA), serial advanced technology attachment (SATA), SCSI, or PCI express (PCIe). In addition, the controller may perform wear levelling, garbage collection, bad block management, and error correcting code (ECC) on the non-volatile memory device. In this case, the controller may include a script for automatic execution and an application program that may be executed by the external host. 
     The package substrate module  300  may further include an active or passive device ( 308  of  FIG.  4   ) such as a chip resistor, a chip capacitor, an inductor, a switch, a temperature sensor, a direct current (DC)-DC converter, quartz for generating a clock signal, or a voltage regulator, which is attached onto the package base substrate  302 . 
       FIGS.  6  and  7    are a rear view and a side view of a case of a solid state drive apparatus according to an example embodiment of the inventive concepts. 
     Referring to  FIGS.  6  and  7   , as described above, the case ( 100  of  FIGS.  1  to  4   ) of the solid state drive apparatus ( 500  of  FIG.  1   ) may be provided. The case  100  may include the base  102  and the side walls  104 . As described above, at the edge of the rear surface  102   b  of the base  102 , the buffer  106  capable of reducing (or, alternatively, preventing) the case  100  from being damaged by external shock may be provided. Furthermore, the screw holes  118  that may mechanically contact the external apparatus may be positioned in the side walls  104  of the case  100 . 
       FIG.  8    is a plan view of a case of a solid state drive apparatus according to an example embodiment of the inventive concepts. 
     In detail, as described above, the case ( 100  of  FIGS.  1  to  4   ) of the solid state drive apparatus ( 500  of  FIG.  1   ) may include the base  102 . The base  102  may include the surface  102   a.  The metal pillar  202  that forms the electrostatic prevention structure  206  may be provided on the surface  102   a  of the base  102 . 
     The metal pillar  202  may be divided into the sub-pillars  202   a,    202   b,  and  202   c.  The sub-pillars  202   a,    202   b,  and  202   c  may be connected to each other. Therefore, the sub-pillar  202   b  may be referred to as a sub-connection pillar for connecting partial side walls of the sub-pillars  202   a  and  202   c.    
     At an edge of the case  100 , the substrate mounting unit  120 , on which the package substrate module ( 300  of  FIG.  4   ) may be mounted, may be provided. The package base substrate ( 302  of  FIG.  4   ) of the package substrate module ( 300  of  FIG.  4   ) may be mounted on the substrate mounting unit  120 . 
     Screw holes  120   a,    120   b,  and  120   c  that may be fastened to the package base substrate ( 302  of  FIG.  4   ) may be provided in the substrate mounting unit  120 . The screw holes  120   a ,  120   b,  and  120   c  may be provided at the edge of the case  100 . 
     In addition, in the case  100 , a buffer pin  124  protruding from the surface  102   a  of the base  102  may be provided so that the package base substrate  302  may be easily settled in the substrate mounting unit  120 . Furthermore, the screw holes  116  that extend to the inside of the case  100  and may mechanically contact the external apparatus may be positioned. 
       FIGS.  9  and  10    are side views of a case of a solid state drive apparatus according to an embodiment of the inventive concepts. 
     Referring to  FIGS.  9  and  10   , the case ( 100  of  FIGS.  1  to  4   ) of the solid state drive apparatus ( 500  of  FIG.  1   ) may include the side walls  104  and  108 . The side walls  104  may be the left and right side walls of the case  100  of  FIG.  4   . The side walls  108  may be the front and rear side walls of the case  100  of  FIG.  4   . 
     The heat discharge holes  112  for receiving air and discharging heat generated by the package substrate module ( 300  of  FIG.  4   ) may be provided in the front and rear side walls  108 . Furthermore, the screw holes  116  that may mechanically contact the external apparatus may be positioned in the side walls  104  of the case  100 . 
       FIG.  11    is a cross-sectional view taken along the line XI-XI′ of  FIG.  8   . 
     In detail, the case ( 100  of  FIGS.  1  to  4   ) of the solid state drive apparatus ( 500  of  FIG.  1   ) may include the base  102 . The base  102  may include the surface  102   a.  The metal pillar  202  that forms the electrostatic prevention structure  206  may be provided on the surface  102   a  of the base  102 . 
     Furthermore, the metal pillar  202  is formed to protrude from the surface  102   a  of the base  102  and to be adjacent to the space  122 . That is, the metal pillar  202  is divided by the space  122  on the surface  102   a  of the base  102 . The radiation distance and the conduction distance of static electricity that permeates from the outside may be increased by the space  122 . 
       FIG.  12    is a perspective view of a solid state drive apparatus including a case and an electrostatic prevention structure according to an example embodiment of the inventive concepts. 
     Referring to  FIG.  12   , a solid state drive apparatus  500 - 1  may be the same as the solid state drive apparatus  500  of  FIGS.  1  to  4    excluding a case  100 - 1  including an electrostatic prevention structure  206   a.    
     In  FIG.  12   , descriptions that are the same as those of  FIGS.  1  to  4    will not be given or will be simply given. In  FIG.  12   , the electrostatic prevention structure  206   a  further includes the electrostatic absorbing member ( 204  of  FIGS.  2  and  4   ), which will be omitted for convenience sake. 
     The case  100 - 1  may include the electrostatic prevention structure  206   a.  The case  100 - 1  and the electrostatic prevention structure  206   a  may be integrated with each other. The electrostatic prevention structure  206   a  may include a metal pillar  202 - 1 . The metal pillar  202 - 1  may be divided into the sub-pillars  202   a,    202   b,  and  202   c.    
     The sub-pillars  202   a,    202   b,  and  202   c  may be connected to each other. The electrostatic prevention structure  206   a  may include holes  210   a,    210   b,  and  210   c  respectively in the metal pillar  202 - 1 , that is, the sub-pillars  202   a,    202   b,  and  202   c.    
     In an example embodiment, the holes  210   a,    210   b,  and  210   c  in the sub-pillars  202   a ,  202   b,  and  202   c  may expose the base  102 . In an example embodiment, the holes  210   a,    210   b , and  210   c  in the sub-pillars  202   a,    202   b,  and  202   c  may not expose the base  102 . The holes  210   a ,  210   b,  and  210   c  may respectively include individual holes H 1 , H 2 , and H 3 . 
     The individual holes H 1 , H 2 , and H 3  may be partitioned off by a partition member IP. Sizes of the individual holes H 1 , H 2 , and H 3  in the holes  210   a,    210   b,  and  210   c  may vary. The electrostatic absorbing member ( 204  of  FIGS.  2  and  4   ) is mounted on the metal pillar  201 - 1  and the holes  210   a,    210   b,  and  210   c  so that the electrostatic prevention structure  206   a  may be completed. 
     Since the holes  210   a,    210   b,  and  210   c  respectively including the individual holes H 1 , H 2 , and H 3  are provided in the metal pillar  202 - 1  of the solid state drive apparatus  500 - 1 , the radiation distance and the conduction distance of static electricity permeating from the outside may increase. The solid state drive apparatus  500 - 1  may reduce (or, alternatively, prevent) the first and second semiconductor chips  304  and  306  mounted on the package substrate module ( 300  of  FIG.  4   ) from being radiation damaged and conduction damaged by external static electricity. 
       FIG.  13    is a perspective view of a solid state drive apparatus including a case and an electrostatic prevention structure according to an example embodiment of the inventive concepts. 
     Referring to  FIG.  13   , a solid state drive apparatus  500 - 2  may be the same as the solid state drive apparatus  500  of  FIGS.  1  to  4    and the solid state drive apparatus  500 - 1  of  FIG.  12    excluding a case  100 - 2  including an electrostatic prevention structure  206   b.    
     In  FIG.  13   , descriptions that are the same as those of  FIGS.  1  to  4  and  12    will not be given or will be simply given. In  FIG.  13   , the electrostatic prevention structure  206   b  further includes the electrostatic absorbing member ( 204  of  FIGS.  2  and  4   ), which will be omitted for convenience sake. 
     The case  100 - 2  may include the electrostatic prevention structure  206   b.  The case  100 - 2  and the electrostatic prevention structure  206   b  may be integrated with each other. The electrostatic prevention structure  206   b  may include a metal pillar  202 - 2 . The metal pillar  202 - 2  may be divided into the sub-pillars  202   a,    202   b,  and  202   c.    
     The sub-pillars  202   a,    202   b,  and  202   c  may be connected to each other. The electrostatic prevention structure  206   b  may include holes  212   a,    212   b,  and  212   c  in the metal pillar  202 - 2 , that is, the sub-pillars  202   a,    202   b,  and  202   c.    
     In an example embodiment, the holes  212   a,    212   b,  and  212   c  in the sub-pillars  202   a ,  202   b,  and  202   c  may expose the base  102 . In an example embodiment, the holes  212   a,    212   b , and  212   c  in the sub-pillars  202   a,    202   b,  and  202   c  may not expose the base  102 . The holes  212   a ,  212   b,  and  212   c  may include a communication hole H 4 . The electrostatic absorbing member ( 204  of  FIGS.  2  and  4   ) is mounted on the metal pillar  201 - 1  and the holes  212   a,    212   b,  and  212   c  so that the electrostatic prevention structure  206   a  may be completed. 
     Since the holes  212   a,    212   b,  and  212   c  including the communication hole H 4  are provided in the metal pillar  202 - 2  of the solid state drive apparatus  500 - 2 , the radiation distance and the conduction distance of static electricity permeating from the outside may increase. The solid state drive apparatus  500 - 2  may reduce (or, alternatively, prevent) the first and second semiconductor chips  304  and  306  mounted on the package substrate module ( 300  of  FIG.  4   ) from being radiation damaged and conduction damaged by external static electricity. 
       FIG.  14    is an exploded perspective view of a solid state drive apparatus including a case and an electrostatic prevention structure according to an example embodiment of the inventive concepts. 
     Referring to  FIG.  14   , a solid state drive apparatus  500 - 3  may be the same as the solid state drive apparatus  500  of  FIGS.  1  to  4    excluding an electrostatic prevention structure  206   c  including electrostatic absorbing members  204 ,  204   a,  and  204   c.    
     In  FIG.  14   , descriptions that are the same as those of  FIGS.  1  to  4    will not be given or will be simply given. The solid state drive apparatus  500 - 3  may be the same as the solid state drive apparatus  500  of  FIGS.  1  to  4    excluding that electrostatic absorbing members  204   a    204   b , and  204   c  are further included as the electrostatic prevention structure ( 206  of  FIGS.  2  and  4   ). The electrostatic prevention structure  206  may include the metal pillar  202  and the electrostatic absorbing members  204 ,  204   a,    204   b,  and  204   c.    
     The electrostatic absorbing members  204 ,  204   a,    204   b,  and  204   c  may include the first electrostatic absorbing member  204  on the metal pillar  202 , the second electrostatic absorbing member  204   a  on a partial surface of the metal pillar  202 , the third electrostatic absorbing members  204   b  and  204   c  at a circumference of the metal pillar  202 , for example, in the case  100  of the metal pillar  202 . 
     The electrostatic absorbing members  204   a,    204   b,  and  204   c  are further provided on a surface of the metal pillar  202  of the solid state drive apparatus  500 - 3  or at the circumference of the metal pillar  202  so that static electricity permeating from the outside may be absorbed better. Therefore, the solid state drive apparatus  500 - 3  may reduce (or, alternatively, prevent) the first and second semiconductor chips  304  and  306  mounted on the package substrate module ( 300  of  FIG.  4   ) from being radiation damaged and conduction damaged by external static electricity. 
       FIG.  15    is a block diagram of a solid state drive apparatus according to an example embodiment of the inventive concepts. 
     Referring to  FIG.  15   , a solid state drive apparatus  1100  includes non-volatile memories  1110  and a controller  1120 . The non-volatile memories  1110  may store data and may have a non-volatile characteristic of maintaining the stored data as it is although power supply is stopped. The solid state drive apparatus  1100  may be one of the solid state drive apparatuses  500 ,  500 - 1 , and  500 - 3 . 
     The controller  1120  reads the data stored in the non-volatile memory  1110  in response to read/write request of a host HOST or may store the data of the non-volatile memory  1110 . An interface  1130  transmits command and address signals to the host HOST or receives the command and address signals from the host HOST and transmits the command and address signals to the non-volatile memory  1110  through the controller  1120  or may receive the command and address signals from the non-volatile memory  1110 . 
     The solid state drive apparatus  1100  may further include an active element or a passive element such as a resistor, a capacitor, an inductor, a switch, a temperature sensor, a DC-DC converter, quartz for generating a clock, or a voltage regulator. 
       FIG.  16    is a block diagram of a system according to an example embodiment of the inventive concepts. 
     Referring to  FIG.  16   , a system  1200  may include a processor  1230  such as a central processing unit (CPU) communicating through a common bus  1260 , random access memory (RAM)  1240 , a user interface  1250 , and a modem  1220 . Further, the system  1200  may include a storage apparatus  1210 . The devices may transmit a signal to the storage apparatus  1210  and receive a signal from the storage apparatus  1210  through the common bus  1260 . The storage apparatus  1210  may include a flash memory  1211  and a memory controller  1212 . The flash memory  1210  may store data and may have a non-volatile characteristic capable of maintaining the stored data as it is although power supply is stopped. The storage apparatus  1210  may be one of the above-described solid state drive apparatuses  500 ,  500 - 1 , and  500 - 3 . 
     While example embodiments of the inventive concepts have been particularly shown and described with reference to some example embodiments thereof, it will be understood that various changes in form and details may be made therein without departing from the spirit and scope of the following claims.