Circuit board container and its door lock mechanism
The door lock mechanism in substrate containers ensures secure locking by preventing engagement of the second latch tip into the first socket when misaligned, maintaining airtightness and preventing accidental detachment, addressing the issue of improper orientation in existing containers.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- ENTEGRIS INC
- Filing Date
- 2024-06-03
- Publication Date
- 2026-07-08
AI Technical Summary
Existing substrate containers lack a reliable mechanism to ensure the door is properly oriented for secure locking, which can lead to accidental detachment and compromised airtightness, affecting the integrity of the container during transportation and processing of semiconductor wafers.
A door lock mechanism with first and second latches, each having a latch tip that can rotate and extend through specific sockets on the door frame, ensuring proper orientation by preventing the second latch tip from engaging the first socket when the door is misaligned, thus maintaining airtightness and preventing accidental detachment.
The mechanism ensures secure locking only when the door is correctly oriented, enhancing airtightness and preventing accidental detachment, thereby maintaining the integrity of the container during transportation and processing of semiconductor wafers.
Smart Images
Figure 2026522559000001_ABST
Abstract
Description
[Technical Field]
[0001]
[0001] This disclosure relates to a substrate container. More specifically, this disclosure relates to a door lock mechanism for a substrate container. [Background technology]
[0002]
[0002] Semiconductor devices can be manufactured from wafer substrates. A wafer substrate, or simply a wafer, undergoes a series of manufacturing steps. For example, the manufacturing steps may include, but are not limited to, the deposition of material layers on the substrate, doping, etching, or chemical or physical reactions of one or more materials. Before, during, or after manufacturing, one or more wafers may be stored and transported in a substrate container, such as a forward-opening unified pod ("FOUP"). The substrate container may include a removable door for accessing the inside of the substrate container. For example, the door may be removable (e.g., opened) to allow one or more wafers to be placed in the container and / or one or more wafers to be removed from the container. In some processes, the door may be removed to access the wafers and apply manufacturing steps to each of the wafer substrates individually. [Overview of the project]
[0003]
[0003] In one embodiment, the substrate container includes a shell and a door. The shell has an opening that defines an internal space and is defined by a door frame. The door frame includes one or more first latch sockets and one or more second latch sockets located on the opposite side of the door frame. The door includes a first locking mechanism. The door is configured to be inserted into the opening of the shell and to be attached to the door frame by the first locking mechanism. The first locking mechanism includes a first latch and a second latch. The first latch includes a first latch tip that is rotatable to extend through a first side of the door. The second latch includes a second latch tip that is rotatable to extend through a second side of the door. The first latch tip has a width that allows it to be inserted into both one or more first latch sockets and one or more second latch sockets. The second latch tip has a width that allows it to be inserted into one or more second latch sockets. One or more first latch sockets have a first width that prevents the second latch tip from being inserted into one or more first latch sockets.
[0004]
[0004] In one embodiment, the door for the substrate container includes a door housing including a first side and a second side, and a locking mechanism disposed within the door housing. The locking mechanism is configured to secure the door into an opening in the shell of the substrate container via one or more first latch sockets and one or more second latch sockets located on the opposite side of the door frame of the shell. The first locking mechanism includes a first latch and a second latch. The first latch includes a first latch tip configured to rotate so as to extend through the first side of the door housing. The second latch includes a second latch tip configured to rotate so as to extend through the second side of the door housing. The first latch tip has a width configured to be inserted into one or more first latch openings. The second latch tip has a width that allows it to be inserted into one or more second latch sockets. The first latch sockets include a width that prevents the second latch tip from being inserted into one or more first latch sockets.
[0005]
[0005] In one embodiment, a method for closing a substrate container is described. The method includes inserting a door into an opening in the substrate container. The substrate container includes a shell that defines an internal space. The shell includes an opening defined by a door frame that includes one or more first latch sockets and one or more second latch sockets. The door includes a first locking mechanism having a first latch and a second latch. The method also includes adjusting the first locking mechanism from an unlocked position to a locked position. Adjusting includes rotating the first latch tip of the first latch so that it extends through a first side of the door, and rotating the second latch tip of the second latch so that it extends through a second side of the door. In a first orientation of the door in the opening, adjusting is configured to insert the first latch tip into one or more first latch sockets and the second latch tip into one or more second latch sockets. In the second orientation of the door in the opening, the adjustment is configured such that the first width of one or more first latch sockets prevents the second latch tip from being inserted into one or more first latch sockets, thereby preventing the first locking mechanism from reaching the locked position. [Brief explanation of the drawing]
[0006] [Figure 1]
[0006] This is a front perspective view of an embodiment of the substrate container. [Figure 2]
[0007] This is a perspective view of the substrate container shown in Figure 1 when it is open, according to an embodiment. [Figure 3]
[0008] This is a side view of the substrate container shown in Figure 1, according to an embodiment. [Figure 4A]
[0009] This is a cross-sectional view of the substrate container shown in Figure 3 when it is locked, according to the embodiment. [Figure 4B]
[0010] This is a cross-sectional view of the substrate container shown in Figure 3 when it is unlocked, according to the embodiment. [Figure 5A]
[0011] It is a partial cross-sectional view of the substrate container in FIG. 4A according to an embodiment. [Figure 5B]
[0012] It is a partial cross-sectional view of the substrate container in FIG. 4B according to an embodiment. [Figure 6]
[0013] It is an enlarged view of region A in FIG. 4A according to an embodiment. [Figure 7]
[0014] It is an enlarged view of region B in FIG. 4B according to an embodiment. [Figure 8]
[0015] It is a cross-sectional view of the substrate container in FIG. 4B with the door rotated according to an embodiment. [Figure 9]
[0016] It is a cross-sectional view showing a state where the insertion of the latch tip is blocked when trying to lock the substrate container with the door rotated in FIG. 8 according to an embodiment. [Figure 10]
[0017] It is a block flow diagram of an embodiment of a method for closing a substrate container.
Embodiments for Carrying Out the Invention
[0007]
[0018] The same number represents the same feature.
[0008]
[0019] To form a semiconductor device, a substrate in wafer form can be processed. The substrate container is a container for transporting the substrate during processing. The substrate can be housed in the substrate container before and during different processing steps. The substrate container is accessed through an opening of the substrate container. The substrate container can be, for example, a front-opening unified pod (FOUP).
[0009]
[0020] The substrate container may include a door that is inserted into the opening. The door may be configured to be inserted into the opening in multiple orientations. For example, the shape of the door may allow it to be inserted in multiple orientations, providing a door with improved airtightness of the opening. Embodiments described herein may include a locking mechanism on the door that does not lock when the door is not in the desired orientation. For example, if the locking mechanism fails to lock, it may indicate to the user and / or an automatic mounting device that the door has been inserted in the wrong orientation.
[0010]
[0021] Figures 1 and 2 show an embodiment of the substrate container 1. The substrate container 1 includes a shell 10 and a door 50. Figure 1 is a front perspective view of the substrate container 1 with the door 50 inserted (e.g., closed). Figure 2 is a perspective view of the substrate container with the door 50 removed (e.g., open). The shell 10 includes an opening 12 (shown in Figure 2). As shown in Figure 1, the door 50 is housed within the opening 12 of the shell 10 and closes the opening 12.
[0011]
[0022] Figure 2 shows the substrate container 1 with the door 50 removed (e.g., opened). As shown in Figure 2, the substrate container 1 includes an internal space 2 in which a substrate (not shown) is housed. The internal space 2 of the substrate container is defined by the shell 10. The door 50 is housed in the shell 10 by inserting it into the opening 12 of the shell 10. As shown in the illustrated embodiment, the substrate container 1 may be a front-opening unified pod ("FOUP"). For example, the opening 12 may be the front opening of the shell 10, and the door 50 may be the front door of the substrate container 1.
[0012]
[0023] The door 50 includes one or more locking mechanisms 60A, 60B (for example, shown in Figure 4A) configured to attach the door 50 to the shell 10. For example, one or more locking mechanisms 60A, 60B are configured to prevent the door 50 from accidentally detaching from the shell 10. The substrate container 1 can be opened by unlocking one or more locking mechanisms 60A, 60B of the door 50 and then moving the door 50 out of the opening 12 (for example, opening, removing). For illustrative purposes, a door with the locking mechanisms 60A, 60B in the locked position is shown in Figure 2. The door 50 should be understood as being in the unlocked position for removal from the shell 10. The door 50 may include one or more keyholes 51 that allow operation of one or more locking mechanisms 60. For example, a load port key (not shown) can be inserted into each keyhole 51 and rotated to unlock the locking mechanisms 60A, 60B. One or more of the locking mechanisms 60A and 60B will be described in more detail below.
[0013]
[0024] As further shown in Figure 2, the shell 10 includes a first side wall 14, a second side wall 16, a top wall 18, and a bottom wall 20, as well as a rear wall 22. The first side wall 14 is opposite the second side wall 16, and the top wall 18 is opposite the bottom wall 20. The first side wall 14 may be referred to as the left side, while the second side wall 16 may be referred to as the right side. The top wall 18 and the bottom wall 20 extend between the first side wall 14 and the second side wall 16, respectively.
[0014]
[0025] The substrate container 1 may include an equipment connection section 6 on the upper wall 18 of the shell 10. In one embodiment, this equipment connection section 6 allows a standard automatic mounting device (not shown) for moving the substrate container 1, such as an automatic arm (not limited to), to be connected to the substrate container 1. For example, an automatic arm may be used to move the substrate container 1 between different processing devices. In one embodiment, the substrate container 1 may include one or more handles for a user (e.g., a technician) to manually move the substrate container 1.
[0015]
[0026] The substrate container 1 may include a plurality of shelves 4 for holding substrates (not shown) in the internal space 2. The portion of the shelf 4 on the second side wall 16 has a similar configuration (e.g., slots in the substrate container 1) to the portion on the shelf 4 on the first side wall 14, although this is not clearly visible in Figure 2. The shelves 4 are sized to each hold a substrate (not shown) in the internal space 2. For example, the shelves 4 in this embodiment are sized to hold substrates of a specific size (e.g., 150 mm wafers, 200 mm wafers, etc.).
[0016]
[0027] The shell 10 includes a door frame 30 that defines an opening 12 of the shell 10. The door frame 30 is formed by a first side wall 14, a second side wall 16, a top wall 18, and a bottom wall 20 of the shell 10. For example, the first side wall 14, the second side wall 16, the top wall 18, and the bottom wall 20 each have ends 28A, 28B, 28C, and 28D adjacent to the opening 12 of the shell 10 (for example, each having a front end). The ends 28A, 28B, 28C, and 28D of the walls 14, 16, 18, and 20 form the door frame 30.
[0017]
[0028] The door frame 30 includes one or more first latch sockets 32A1, 32A2 (for example, shown in Figure 4A) and one or more second latch sockets 32B1, 32B2. A socket refers to an opening formed in the shell 10 that is configured to accommodate a latch tip from the door 50 and prevents the door 50 from coming off the shell 10 while the latch tip is positioned in the opening. For example, the opening may be in the form of a slot, pocket, etc., formed in the shell 10, but is not limited to these. One or more first latch sockets 32A1, 32A2 are positioned on the opposite side of the door frame 30 from the one or more second latch sockets 32A1, 32A2. In the illustrated embodiment, the door frame 30 includes the first latch sockets 32A1, 32A2 (for example, shown in Figure 4A) and the second latch sockets 32B1, 32B2. As shown in Figure 1, the first latch sockets 32A1, 32A2 and the second latch sockets 32B1, 32B2 are located on opposite sides of the door frame 30. For example, the first latch sockets 32A1, 32A2 are located on the upper wall 18, and the second latch sockets 32B1, 32B2 are located on the bottom wall 20. The first latch sockets 32A1, 32A2 and the second latch sockets 32B1, 32B2 are positioned along the outer edge of the door frame 30 (for example, on the edge extending to the opening 12).
[0018]
[0029] When in the locked position, the locking mechanisms 60A and 60B engage with the first latch sockets 32A1 and 32A2 and the second latch sockets 32B1 and 32B2 to prevent the door 50 from disengaging from the opening 12 of the shell 10. In the locked position, the first locking mechanism 60A engages with the first socket of the first latch socket 32A1 and the first socket of the second latch socket 32B1. In the locked position, the second locking mechanism 60B engages with the second socket of the first latch socket 32A2 and the second socket of the second latch socket 32B2.
[0019]
[0030] Figure 3 is a side view of the substrate container 1 of Figure 1 according to an embodiment. Figures 4A and 4B are cross-sectional views of the substrate container 1 according to an embodiment, respectively. The cross-sectional views of Figures 4A and 4B are both along the lines shown in Figure 3. Figure 4A shows the first locking mechanism 60A of the door 50 in the locked position. Figure 4B shows the first locking mechanism 60A of the door 50 in the unlocked position.
[0020]
[0031] The door 50 includes a door housing 52 that defines the internal space 54 of the door 50. Figure 4 shows the internal space 54 of the door 50. The door housing 10 separates the internal space 54 of the door 50 from the internal space 2 of the shell 10 in which the wafers are housed. Locking mechanisms 60A and 60B are located within the door housing 52 of the internal space 54 of the door 50. Each locking mechanism 60A and 60B is configured to move between a locked position and an unlocked position. The door 50 (for example, in Figures 1 and 4A) is configured to seal the opening 12 of the substrate container 1. For example, the seal between the door 50 and the shell 10 is configured to prevent foreign matter (e.g., dust, moisture, air, etc.) from entering the internal space 2 through the opening 12.
[0021]
[0032] The door 50 includes a first side 56A, a second side 56B, a third side 56C, and a fourth side 56D. As shown in Figure 4A, sides 56A, 56B, 56C, and 56D can each be side walls of the door housing 52 of the door 50. As shown in Figure 4, the first side 56A and the second side 56B are opposite sides of the door 50. For example, the first side 56A, the second side 56B, the third side 56C, and the fourth side 56D can each be side walls of the door housing 52 of the door 50. As shown in Figure 4, in the locked position, the first side 56A of the door 50 faces the top wall 18 of the shell 10, and the second side 56B of the door 50 faces the bottom wall 18 of the shell 10. In the locked position, the third side 56C of the door 50 faces the first side wall 14 of the shell 10, and the fourth side 56D of the door 50 faces the second side wall 16 of the shell 10.
[0022]
[0033] In the illustrated embodiment, the door 50 includes a first locking mechanism 60A and a second locking mechanism 60B. It should be understood that the door 50 of the substrate container 1 in the embodiment may include two different numbers of locking mechanisms. For example, the door 50 in the embodiment may include one locking mechanism, three locking mechanisms, or more than three locking mechanisms. In one embodiment, the door 50 may include a single locking mechanism 60A. In such an embodiment, the door frame 30 may include a single first latch socket 34A1 and a single second latch socket 34B1 for the single locking mechanism 60A.
[0023]
[0034] As shown in Figure 4A, the first locking mechanism 60A includes a first latch 70A and a second latch 70B. The first latch 70A includes a first latch tip 80A. The second latch 70B includes a second latch tip 80B. The first locking mechanism 60A is configured to move between an unlocked position (shown in Figure 4B) and a locked position (shown in Figure 4A).
[0024]
[0035] In the illustrated embodiment, the first locking mechanism 60A includes a rotatable cam 62A for moving the first locking mechanism 60A between a locked position and an unlocked position. For example, the rotatable cam 62A can be rotated by a load port key (not shown) through a keyhole 51 (shown in Figures 1 and 2) formed in the door housing 52. The rotatable cam 62A is coupled to both the first latch 70A and the second latch 70B. For example, the rotatable cam 62A can be coupled separately to each of the first latch 70A and the second latch 80B. The rotatable cam 62A is configured to be operated and rotated using an external tool (e.g., a user, an automatic installation device, etc.). The rotatable cam 62A is rotatable within the door 50 (e.g., rotatable relative to the door housing 52). The rotatable cam 62A is configured such that when the rotatable cam 62A rotates, the first latch tip 80A of the first latch 70A and the second latch tip 80B of the second latch 70B also rotate.
[0025]
[0036] The first latch 70A includes a first arm 72A. The first arm 72A is coupled to the first latch tip 80A such that when the rotatable cam 62A rotates, the first latch tip 80A also rotates. The second latch 70B includes a second arm 72B. The second arm 72B is coupled to the second latch tip 80B such that when the rotatable cam 62A rotates, the second latch tip 80B also rotates. For example, each arm 72A, 72B is coupled to the rotatable cam 62A and their respective latch tips 80A, 80B so that when the rotatable cam 62A rotates, each arm 72A, 72B moves linearly (for example, relative to the door housing 52), and the linear movement of each arm 72A, 72B causes each latch tip 80A, 80B to move and rotate so that it extends from the door housing 52. The rotation of the latch tips 80A and 80B will be explained in more detail below.
[0026]
[0037] When the first locking mechanism 60A is locked (for example, when the locking mechanism is moved from the unlocked position in Figure 4B to the locked position in Figure 4A), the first latch tip 80A rotates and extends through the first side surface 56A of the door 50, and the second latch tip 80B rotates and extends through the second side surface 56B of the door 50. The first latch tip 80A rotates and extends through the first side surface 56A into the first latch socket 32A1 of the shell 10. The second latch tip 80B also rotates and extends through the second side surface 56B into the second latch socket 32B1 of the shell 10. As shown in Figure 4A, in the locked position, the first latch tip 80A is located in the first latch socket 32A1 of the shell 10, and the second latch tip 80B is located in the second latch socket 32B1 of the shell 10.
[0027]
[0038] When the first locking mechanism 60A is unlocked (for example, by moving the locking mechanism from the locked position in Figure 4A to the unlocked position in Figure 4B), the first latch tip 80A rotates and retracts through the first side surface 56A of the door 50, and the second latch tip 80B rotates and extends through the second side surface 56B of the door 50. The first latch tip 80A retracts into the door housing 52 through the first side surface 56A. The second latch tip 80B retracts into the door housing 52 through the second side surface 56B. As shown in Figure 4B, in the unlocked position, the first latch tip 80A is located in the internal space 54 of the door 50, and the second latch tip 80B is located in the internal space 54 of the door 50.
[0028]
[0039] If present, the second locking mechanism 60B may have a configuration similar to that of the first locking mechanism 60A. For example, the second locking mechanism 60B may include, similar to the first locking mechanism 60A, a second rotatable cam 62B, a third latch 80C having a third latch arm 72C and a third latch tip 80C, and a fourth latch 80C having a fourth latch arm 72D and a fourth latch tip 80D. For example, similar to the first latch tip 80A and the second latch tip 80B of the first locking mechanism 80A, the third latch tip 80C of the door 50 rotates and extends through the first side 56A of the door 50 (for example, so as to be positioned in the second socket of the first latch socket 32A2), and the fourth latch tip 80D of the door 50 rotates and extends through the second side 56B of the door 50 (for example, so as to be positioned in the second socket of the second latch socket 32B2).
[0029]
[0040] Figures 5A and 5B are cross-sectional views of the first latch 70A according to an embodiment. A cross-sectional view of Figure 5A is shown in Figure 4A. A cross-sectional view of Figure 5B is shown in Figure 4B. Figure 5A shows the tip 80A of the first latch when the first locking mechanism 60A of the door 50 is in the locked position. Figure 5B shows the tip 80A of the first latch when the first locking mechanism 60A of the door 50 is in the unlocked position.
[0030]
[0041] The first latch tip 80A includes an engaging member 82A and a pivot member 84A. The engaging member 82A and the pivot member 84A extend in different directions (for example, each has a length that extends in a direction different from the length of the other member). The door 50 includes an opening 58A for the first latch tip 80A. As shown in Figures 5A and 5B, the opening 58A is located on the first side surface 56A of the door housing 52. Rotation of the first latch tip 80A causes the engaging member 82A to move and extend through the opening 58A in the first side surface 56A of the door 50. In the locked position, the engaging member 82A is positioned within the first latch socket 32A1 of the shell 10.
[0031]
[0042] As described above, the first arm 72A is configured to move linearly along the first direction D1. The first latch tip 80A is rotatably coupled to the first arm 72A. For example, the first arm 72A may be rotatably coupled to the shaft 86A of the first latch tip 80A. The engaging member 82A and pivot member 84A of the first latch tip 80A extend in different directions from the shaft 86A of the first latch tip 80A, respectively. When the first arm 72A moves, the first latch tip 80A also moves in the first direction D1 (for example, the first latch tip 80A moves together with the first arm 72A because it is coupled to the first arm 72A).
[0032]
[0043] As the first latch tip 80A moves, the pivot member 84A is pressed against the inner surface 59A of the door 50 (for example, the inner surface 59A of the first side surface 56A of the housing 52), thereby rotating the first latch tip 80A. When the pivot member 84A contacts the inner surface 59A, the first latch tip 80A moves in direction D1, and the first latch tip 80A also rotates. The first latch tip 80A rotates relative to the first arm 72A and the housing 52.
[0033]
[0044] The second arm 72B and second latch tip 80B of the second latch 70B may have the same configuration and movement as the first arm 72A and first latch tip 80A of the first latch 70A, except that they move in the opposite direction to the first arm 72A. For example, the second arm 72B moves in the opposite direction (for example, the opposite direction to the first direction D1 when locked). Also, the second latch tip 80B rotates and extends through the opening in the second side 56B of the door 50.
[0034]
[0045] Figure 6 is an enlarged view of area A in Figure 4A according to an embodiment. Figure 7 is an enlarged view of area B in Figure 4A. Figure 6 shows an enlarged view of the engagement between the first latch 70A of the door 50 and the first latch socket 32A1 of the shell 10. Figure 7 shows an enlarged view of the engagement between the second latch 70B of the door 50 and the second latch socket 32B1 of the shell 10. Figure 7 shows an enlarged view of the engagement between the second latch 70B of the door 50 and the first latch socket 32A1 of the shell 10.
[0035]
[0046] As shown in Figure 7, the second latch socket 32B1 of the shell 10 has a width W S2 It has the following: As shown in Figure 6, the first latch socket 32A1 of the shell 10 has a width W S1 It has the width W of the first latch socket 32A1. S1 The width W of the second latch socket 32B1 S2 Shorter than. As shown in Figure 6, the door frame 30 includes a pair of ribs 34 positioned in the first latch socket 32A1. Width W of the first latch socket 32A1 S1 This is defined by the rib 34. In another embodiment, the first latch socket 32A1 has a width W S1 It may include a single rib 34 that defines the W S1 It may be formed to have a width W of the first latch socket 32A1. S1 The width can be defined by the end wall 36A that forms and defines the latch socket 32A1 (for example, width WS1 can be the entire width of the first latch socket 32A1 formed in the door frame 30). For example, the width of each latch socket extends in the length direction of the door frame 30 (for example, a direction perpendicular to the insertion direction of the door 5, a direction parallel to the periphery of the opening 12).
[0036]
[0047] As shown in FIG. 7, the width W of the second latch socket 32B1 S2 is the width W of the first latch socket 32A1 S1 and is longer. The width W of the second latch socket 32B1 S2 is defined by the end wall 36B that forms and defines the latch socket 32A1 (for example, the width W S2 is the entire width of the second latch socket 32B1 formed in the door frame 30). In another embodiment, the door frame 30 may include one or more ribs to form the relatively long width W of the second latch socket 32 S2 .
[0037]
[0048] The first latch tip 80A has a width W LT1 . The width W of the first latch tip 80A LT1 is insertable into the first latch socket 32A1. The width W of the first latch tip 80A LT1 is also insertable into the second latch socket 32B1. For example, the width W of the first latch tip 80A LT1 is equal to or shorter than both the width W of the first latch socket 32A1 S1 and the width W of the second latch socket 32B1 LT1 . The end of the first latch tip 80A also has a shape such that the first latch tip 80A is insertable into both the first latch socket 32A1 and the second latch socket 32B1. For example, the width W of the first latch tip 80A LT1 is the width of the engaging member 82A of the first latch tip 32A1. The width W LT1 can be the width of the most end face 88A of the first latch tip 80A (for example, the width W LT1 is the width of the most end face 88A of the engaging member 82A of the first latch tip 80A).
[0038]
[0049] The second latch tip 80B has a width W LT2 It has the width W of the second latch tip 80B. LT2 It can be inserted into the second latch socket 32B1. The width W of the second latch tip 80B. LT2 This prevents the insertion of the second latch tip 80B into the second latch socket 32B1. For example, the width W of the second latch tip 80B. LT2 The width W of the second latch socket 32B1 S2 The following applies, and the width W of the second latch socket 32B1. LT2 Larger. For example, the width W of the second latch tip 80B. LT2 This is the width of the engaging member 82B of the second latch tip 80B. LT2 The width of the outermost end face 88B of the second latch tip 80B (for example, the width W of the outermost end face 88B of the engaging member 82B of the second latch tip 80B) LT2 ) is possible.
[0039]
[0050] The latch tips 80C and 80D in the second locking mechanism 60B may have a configuration similar to that of the latch tips 80A and 80B of the first locking mechanism 60A as described above. The first slot 32A2 and the second latch socket 32B2 engaged by the latch tips 80C and 80D of the second locking mechanism 60B are similar to the first slot 32 engaged by the latch tips 80A and 80B of the first locking mechanism 60A. A1 and the second latch socket 32 B1 It may have a configuration similar to the one described earlier. For example, the third latch tip 80C may have a width (e.g., width W) of the fourth latch tip 80C, as shown in Figures 4A and 4B. LT2 ) has a width shorter than (for example, width W LT1 (may have) For example, as shown in Figure 4A, the first latch socket 32 A2 The width of the second latch socket 32B2 (for example, width W) S2 A width shorter than (for example, width W) S1 ) may have. In one embodiment, the shell 10 has a first latch socket 32 A2 Located inside, the first latch socket 32A2 It may include one or two ribs (for example, similar to rib 34) that define the width.
[0040]
[0051] Figures 4A and 4B show the door 50 inserted into the door frame 30 in a first orientation. The door 50 is configured to be insertable into the door frame 30 in both the first and second orientations. Figure 8 is a cross-sectional view of the substrate container 1 with the door 50 inserted in a second orientation according to an embodiment. The cross-sectional view of Figure 8 is the same as that of Figure 4B, except for the orientation of the door 50. For example, the door 50 may have the same position within the door frame 30 in both the first and second orientations (for example, the door 50 is installed in the door frame 30 in both the first and second orientations).
[0041]
[0052] In Figure 8, the door 50 is inverted to a second orientation relative to the first orientation (for example, upside down). The door 50 in the second orientation is rotated 180 degrees relative to the door 50 in the second orientation. For example, in the second position, the first side 56A of the door 50 faces downward (for example, facing the bottom wall 20 of the shell 10), and the second side 56B of the door 50 faces upward (for example, facing the top surface 18 of the shell 10).
[0042]
[0053] As shown in Figure 8, in the second orientation, the first latch tip 80A is aligned with the second latch socket 32B2, and the second latch tip 80B is aligned with the first latch socket 32A2. In the illustrated embodiment, the first latch tip 80A is aligned with the second socket of the second latch socket 32B2, and the second latch tip 80B is aligned with the second socket of the first latch socket 32A2. In the case of the second locking mechanism 60B, the third latch tip 80C is aligned with the first socket of the second latch socket 32B1, and the fourth latch tip 80C is aligned with the first socket of the first latch socket 32A1.
[0043]
[0054] Figure 8 shows the first locking mechanism 60A in the unlocked position. The second latch tip 80B is configured to prevent the first locking mechanism 60A from moving into the locked position. When the first locking mechanism 60A moves out of the unlocked position, the second latch tip 80B is prevented from entering the first latch socket 32A2. The width of the first latch socket 32A2 (e.g., width WS2) prevents the insertion of the second latch tip 80B into the first latch socket 32A2. In the illustrated embodiment, the ribs of the first latch socket 32A2 (e.g., rib 34) prevent the insertion of the second latch tip 80B into the first latch socket 32A2. In one embodiment, the insertion of the second latch tip 80B into the first latch socket 32A2 may be prevented by at least one of the ribs of the first latch socket 32A2 (e.g., rib 34) and the end wall 36A. The insertion of the second latch tip 80B into the first latch socket 32A2 is prevented, thereby preventing the locking of the first locking mechanism 60A when the door 50 is in the second orientation (for example, preventing the first locking mechanism 60A from moving to the locked position, or preventing the first locking mechanism 60A from reaching the locked position).
[0044]
[0055] As shown in Figure 8, the width W of the first latch tip 80A LT1 The first latch tip 80A is insertable into the second latch socket 32B2. The first latch tip 80A is also aligned with the second latch socket 32B2 in a second orientation. The insertion of the first latch tip 80A into the second latch socket 32B2 is restricted by preventing the insertion of the second latch tip 80B into the first latch socket 32A21. For example, the first latch 70A and the second latch 70B are both actuated by a rotatable cam 62A. The insertion / movement of the second latch tip 80B into the first latch socket 32A2 is prevented by preventing further rotation of the rotatable cam 62A, thereby restricting further rotation / extension of the first latch tip 80A into / to the second latch socket 32B2.
[0045]
[0056] As described above, the door 50 in the embodiment may include a single locking mechanism 60A. In such an embodiment, rotation of the door 50 between a first orientation and a second orientation may rotate the first locking mechanism 60A without moving its general position within the door 50. In such an embodiment, in the second orientation, the first latch tip 80A may be aligned with the second latch socket 32B1, and the second latch tip 80B may be aligned with the first latch socket 32A1. The width WS1 of the first latch socket 32A1 prevents the insertion of the second latch tip 80B into the first latch socket 32A1.
[0046]
[0057] Figure 9 is a partial cross-sectional view of a reversed and inserted door 50 according to one embodiment, in which the second latch tip 80B is prevented from being inserted into the shell 10. In Figure 9, the locking mechanism 60A is in an intermediate position between the unlocked position and the locked position. For example, the intermediate position occurs when the locking mechanism 60A is moving from the unlocked position to the locked position.
[0047]
[0058] As shown in Figure 9, the second latch tip 80B is in contact with the rib 34 which prevents the second latch tip 80B from being inserted into the first latch socket 32A2. The relatively large width W of the second latch tip 80B LT2 This prevents the insertion of the second latch tip 80B into the first latch slot 32A2. As shown in Figure 9, preventing the second latch tip 80B means preventing the second latch tip 80B from being inserted too far into the first latch socket 32A2. For example, the end of the second latch tip 80B may still be inserted minimally into the first latch socket 32A2. The insertion of the second latch tip 80B into the first latch socket 32A2 is prevented to the extent that the second latch tip 80B does not engage with the first latch socket 32A2 (e.g., to a certain depth). In one embodiment, at least one rib 34 and / or end wall 36A of the first latch slot 32A2 may be formed (e.g., sized) to prevent the insertion of the second latch tip 80B into the first latch slot 32A2.
[0048]
[0059] In the intermediate position of the locking mechanism 60A, insertion of the first latch tip 80A into the second latch socket 32B2 is not prevented. In the intermediate position, there is nothing in the second socket slot 32B2 that prevents insertion of the first latch tip 80A (for example, the first latch tip 80A is not in contact with a rib, nor is it in contact with the end wall of the second socket 32B2 in a way that could prevent insertion of the first latch tip 80A). For example, the first latch tip 80A in the intermediate position can be partially inserted, just like the second latch tip 80B. Contact with the second latch tip 80B prevents further movement of the locking mechanism 60A toward the locked position (for example, further rotation of the rotatable cam 62) so as to prevent the locking mechanism 60A from reaching the locked position. This prevents insertion and engagement between the first latch tip 80A and the second latch slot 32B2.
[0049]
[0060] Figure 10 is a block diagram of method 1000 for closing a substrate container. For example, method 1000 may be used to close the open substrate container 1 in Figure 2. The substrate container includes a shell (e.g., shell 10) and a door (e.g., door 50), the door including a first locking mechanism (e.g., first locking mechanism 60). Method 1000 begins at 1010.
[0050]
[0061] In 1010, the door is inserted into the opening of the substrate container (e.g., opening 12). The shell includes a door frame (e.g., door frame 30) that defines the opening. The door frame includes one or more first latch sockets (e.g., first latch socket 32A1, first latch socket 32A2) and one or more second latch sockets (e.g., second latch socket 32B1, second latch socket 32B2). Method 1000 then proceeds to 1020.
[0051]
[0062] In 1020, the first locking mechanism is adjusted from the unlocked position to the locked position. For example, the adjustment in 1020 includes moving the first locking mechanism from the unlocked position toward the locked position. The first locking mechanism includes a first latch (e.g., a first latch 70A) and a second latch (e.g., a second latch 80A). The adjustment of the locking mechanism in 1020 includes rotating the first latch tip (e.g., a first latch tip 80A) of the first latch so that it extends through a first side of the door (e.g., a first side 56A). The adjustment of the locking mechanism in 1020 includes rotating the second latch tip of the second latch so that it extends through a second side of the door (e.g., a second side 56B).
[0052]
[0063] For a first orientation of the door in the opening (for example, the orientation of door 50 as shown in Figure 4B), the adjustment of the locking mechanism in 1020 is configured such that the first latch tip is inserted into one or more first latch sockets (for example, into the first latch socket 32A1 and the first latch socket 32A2) and the second latch tip is inserted into the second latch sockets (for example, into the second latch socket 32B1 and the second latch socket 32B2). For example, as a result, the locking mechanism reaches the locked position.
[0053]
[0064] Regarding the second orientation of the door in the opening, the adjustment of the locking mechanism in 1020 is the width (e.g., width W) of one or more first latch sockets (e.g., first latch socket 32A1, first latch socket 32A2). S1 The second latch is configured to prevent the tip of the second latch from being inserted into one or more of the first latch sockets. For example, by preventing the second latch from being inserted into the first latch sockets, the locking mechanism is prevented from reaching the locked position (e.g., prevented).
[0054]
[0065] It should be understood that the method 1000 in the embodiment may be modified to include features such as those illustrated and / or discussed for the substrate containers of Figures 1-9. For example, the adjustment of the locking mechanism in 1010 may include rotating a rotatable cam of the first locking mechanism (e.g., the first rotatable cam 62A).
[0055]
[0066] manner
[0067] Any of embodiments 1 to 12 can be combined with any of embodiments 13 to 20, and any of embodiments 13 to 18 can be combined with any of embodiments 19 and 20.
[0056]
[0068] Appearance 1 A substrate container comprising a shell defining an internal space, the shell having an opening defined by a door frame, the door frame including one or more first latch sockets and one or more second latch sockets located on the opposite side of the door frame, and a door including a first locking mechanism, the door being inserted into the opening of the shell and configured to be attached to the door frame by the first locking mechanism, the substrate container comprising a first latch having a first latch tip rotatable to extend through a first side of the door, the first latch tip having a width that allows it to be inserted into both one or more first latch sockets and one or more second latch sockets, and a second latch having a second latch tip rotatable to extend through a second side of the door, the second latch tip having a width that allows it to be inserted into one or more second latch sockets, the one or more first latch sockets having a first width that prevents the second latch tip from being inserted into one or more first latch sockets.
[0057]
[0069] Embodiment 2: The substrate container according to Embodiment 1, wherein the first socket among one or more first latch sockets has a first width shorter than the width of the first socket among one or more second latch sockets.
[0058]
[0070] Embodiment 3 A substrate container according to Embodiment 2, wherein the door frame includes one or more ribs positioned in a first socket of one or more first latch sockets, the first width of the first socket of one or more first latch sockets is defined by one or more ribs, and one or more ribs are configured to prevent the insertion of a second latch tip into the first socket of one or more first latch sockets by the second latch tip contacting one or more ribs.
[0059]
[0071] Embodiment 4 A substrate container according to any one embodiment of Embodiments 1 to 3, wherein preventing the insertion of a second latch tip into one or more first latch sockets restricts the insertion of a first latch tip into one or more second latch sockets.
[0060]
[0072] Embodiment 5 A substrate container according to any one embodiment of Embodiments 1 to 4, wherein the width of the first latch tip is the width of the end face of the first latch tip, and the width of the second latch tip is the width of the end face of the second latch tip.
[0061]
[0073] Embodiment 6 A substrate container according to any one embodiment of Embodiments 1 to 5, wherein the door is configured to be insertable into the door frame in a first orientation and a second orientation, the door in the second orientation is rotated 180 degrees relative to the first orientation, and the door is configured to be attached to the door frame in the first orientation by a first locking mechanism.
[0062]
[0074] Embodiment 7 The substrate container according to Embodiment 6, wherein, in a second orientation, the insertion of the second latch tip into the first socket of one or more first latch sockets is prevented by the second latch tip contacting at least one of the ribs and end walls of the first socket of one or more first latch sockets.
[0063]
[0075] Embodiment 8 The width of the first latch tip of the first locking mechanism is insertable into both the first socket of one or more first latch sockets and the first socket of one or more second latch sockets, and the width of the second latch tip of the first locking mechanism is insertable into the first socket of one or more second latch sockets, and the door includes a second locking mechanism, the second locking mechanism having a third latch tip that is rotatable so as to penetrate and extend through the first side of the door, the third latch tip being insertable into the second socket of one or more first latch sockets and the first or more second latch sockets A substrate container according to any one embodiment of embodiments 1 to 7, comprising: a third latch having a width that allows insertion into both of the second sockets of the latch; and a fourth latch tip that is rotatable so as to extend through the second side of the door, wherein the fourth latch tip has a width that allows insertion into the second socket of one or more second latch sockets, the first width being the width of the second socket of the first latch socket, and the second width of the first socket of the first latch socket being the fourth latch that prevents the fourth latch tip from being inserted into the first socket of the first latch socket.
[0064]
[0076] Embodiment 9 A substrate container according to any one embodiment of Embodiments 1 to 8, wherein the first latch tip includes an engaging member and a pivot member extending in different directions, the engaging member having the width of the first latch tip, and rotation of the first latch tip moves the engaging member to extend through the opening on the first side of the door.
[0065]
[0077] Embodiment 10: The substrate container according to Embodiment 9, wherein the pivot member is pressed against the inner surface of the door and configured to rotate the tip of the first latch.
[0066]
[0078] Embodiment 11 A substrate container according to any one embodiment of Embodiments 1 to 10, wherein the locking mechanism includes a rotatable cam, a first latch includes a first arm connecting the rotatable cam to the tip of the first latch, and a second latch includes a second arm connecting the rotatable cam to the tip of the second latch, so that the rotation of the rotatable cam causes the tip of the first latch and the tip of the second latch to rotate, respectively.
[0067]
[0079] Embodiment 12 A substrate container according to any one embodiment of Embodiments 1 to 11, wherein the substrate container is a front-opening integrated pod.
[0068]
[0080] Embodiment 13 A door for a substrate container, comprising a door housing including a first side and a second side, and a locking mechanism disposed within the door housing and located on the opposite side of the door frame of the shell, configured to attach the door into an opening in the shell of the substrate container via one or more first latch sockets and one or more second latch sockets, wherein the first locking mechanism comprises a first latch having a first latch tip configured to rotate so as to extend through the first side of the door housing, the first latch tip having a width configured so as to be inserted into one or more first latch openings, and a second latch having a second latch tip configured to rotate so as to extend through the second side of the door housing, the second latch tip having a width so as to be inserted into one or more second latch sockets, the first of the one or more first latch sockets having a width that prevents the second latch tip from being inserted into one or more first latch sockets.
[0069]
[0081] Embodiment 14 The door according to Embodiment 13, wherein the door is configured to be insertable into a door frame in a first orientation and a second orientation, the door in the first orientation rotates 180 degrees relative to the second orientation, and a locking mechanism is configured to attach the door in the first orientation to the door frame.
[0070]
[0082] Embodiment 15 The door according to Embodiment 14, wherein in a second orientation, the locking mechanism is configured such that insertion of the second latch tip into a first socket of one or more first latch sockets is prevented by the second latch tip contacting at least one of the ribs and end walls of the first socket of the first latch socket.
[0071]
[0083] Embodiment 16: A door according to any one embodiment of Embodiments 13 to 15, wherein the width of the first latch tip is the width of the end face of the first latch tip, and the width of the second latch tip is the width of the end face of the second latch tip.
[0072]
[0084] Aspect 17: A door according to any one of aspects 13 to 16, wherein the first latch tip includes an engaging member and a pivot member extending in different directions, the engaging member having the width of the first latch tip, and rotation of the first latch tip moves the engaging member so as to extend through an opening on the first side of the door, and the pivot member is pressed against the inner surface of the door and rotates the first latch tip.
[0073]
[0085] Embodiment 18 A door according to any one embodiment of Embodiments 13 to 17, wherein the locking mechanism includes a rotatable cam, a first latch includes a first arm connecting the rotatable cam to the tip of the first latch, and a second latch includes a second arm connecting the rotatable cam to the tip of the second latch, such that rotation of the rotatable cam causes rotation of the tip of the first latch and the tip of the second latch, respectively.
[0074]
[0086] Embodiment 19 A method for closing a substrate container, comprising inserting a door into an opening of the substrate container, wherein the substrate container includes a shell defining an internal space, the shell having an opening defined by a door frame including one or more first latch sockets and one or more second latch sockets, and the door includes a first locking mechanism including a first latch and a second latch, and adjusting the first locking mechanism from an unlocked position to a locked position, comprising rotating the first latch tip of the first latch so as to extend through a first side of the door, and rotating the second latch so as to extend through a second side of the door A method comprising adjusting a first locking mechanism, including rotating the second latch tip of a latch, wherein the adjustment of the first locking mechanism is configured to perform, in a first orientation of the door in an opening, insert the first latch tip into one or more first latch sockets and insert the second latch tip into one or more second latch sockets, and in a second orientation of the door in an opening, the first width of one or more first latch sockets prevents the second latch tip from being inserted into one or more first latch sockets, thereby preventing the first locking mechanism from reaching a locked position.
[0075]
[0087] Embodiment 20 The method according to Embodiment 19, wherein the first latch tip has a width that allows it to be inserted into both one or more first latch sockets and one or more second latch sockets, and the second latch tip has a width that allows it to be inserted into one or more second latch sockets but does not allow it to be inserted into one or more first latch sockets.
[0076]
[0088] The terms used herein are intended to describe, and not limit, specific embodiments. The terms “a,” “an,” and “the” include the plural form unless otherwise specified. The terms “comprise” and / or “comprising” as used herein express the existence of a described feature, integer, stage, process, element, and / or component, but do not exclude the existence or addition of one or more other features, integers, stages, processes, elements, and / or components. In one embodiment, “couple,” “coupled,” and “coupling” as used herein may mean “directly couple,” “directly coupled,” and “directly couple.”
[0077]
[0089] With regard to the foregoing description, please understand that details may be modified without departing from the scope of this disclosure, particularly with respect to the shape, size, and arrangement of the structural materials and components used. This specification and the embodiments described herein are illustrative only, and the true scope and spirit of this disclosure are shown in the subsequent claims.
Claims
1. A substrate container, A shell defining an internal space, the shell having an opening defined by a door frame, the door frame including one or more first latch sockets and one or more second latch sockets located on the opposite side of the door frame, A door including a first locking mechanism, wherein the door is inserted into the opening of the shell and is configured to be attached to the door frame by the first locking mechanism. A substrate container comprising, the first locking mechanism, A first latch having a first latch tip that is rotatable so as to extend through a first side surface of the door, wherein the first latch tip has a width that allows it to be inserted into both one or more first latch sockets and one or more second latch sockets, and A second latch having a second latch tip that is rotatable so as to penetrate and extend through a second side surface of the door, wherein the second latch tip has a width that allows it to be inserted into one or more second latch sockets, and the one or more first latch sockets have a first width that prevents the second latch tip from being inserted into the one or more first latch sockets. A substrate container, including a substrate container.
2. The substrate container according to claim 1, wherein the first socket among the one or more first latch sockets has a first width that is shorter than the width of the first socket among the one or more second latch sockets.
3. The substrate container according to claim 2, wherein the door frame includes one or more ribs disposed in the first socket of the one or more first latch sockets, the first width of the first socket of the one or more first latch sockets is defined by the one or more ribs, and the one or more ribs are configured to prevent the insertion of the second latch tip into the first socket of the one or more first latch sockets by the second latch tip contacting the one or more ribs.
4. The substrate container according to claim 1, wherein preventing the insertion of the second latch tip into one or more first latch sockets limits the insertion of the first latch tip into one or more second latch sockets.
5. The width of the tip of the first latch is the width of the end face of the tip of the first latch. The substrate container according to claim 1, wherein the width of the tip of the second latch is the width of the end face of the tip of the second latch.
6. The substrate container according to claim 1, wherein the door is configured to be insertable into the door frame in a first orientation and a second orientation, the door in the second orientation is rotated 180 degrees relative to the first orientation, and the door is configured to be attached to the door frame in the first orientation by a first locking mechanism.
7. The substrate container according to claim 6, wherein, in the second orientation, the second latch tip contacts at least one of the ribs and end walls of the first socket among the one or more first latch sockets, thereby preventing the insertion of the second latch tip into the first socket among the one or more first latch sockets.
8. The width of the first latch tip of the first locking mechanism is such that it can be inserted into both the first socket of the one or more first latch sockets and the first socket of the one or more second latch sockets. The width of the tip of the second latch of the first locking mechanism is such that it can be inserted into the first socket of the one or more second latch sockets. The door includes a second locking mechanism, and the second locking mechanism is A third latch having a third latch tip that is rotatable so as to extend through the first side surface of the door, wherein the third latch tip has a width that allows it to be inserted into both the second socket of the one or more first latch sockets and the second socket of the one or more second latch sockets, A fourth latch having a fourth latch tip that is rotatable so as to extend through the second side surface of the door, wherein the fourth latch tip has a width that allows it to be inserted into the second socket of one or more second latch sockets. It has, The first width is the width of the second socket of the first latch socket, The substrate container according to claim 1, wherein the second width of the first socket of the first latch socket prevents the fourth latch tip from being inserted into the first socket of the first latch socket.
9. The substrate container according to claim 1, wherein the first latch tip includes an engaging member and a pivot member extending in different directions, the engaging member having the width of the first latch tip, and rotation of the first latch tip moves the engaging member to extend through the opening on the first side of the door.
10. The substrate container according to claim 9, wherein the pivot member is pressed against the inner surface of the door and configured to rotate the tip of the first latch.
11. The substrate container according to claim 1, wherein the locking mechanism includes a rotatable cam, the first latch includes a first arm connecting the rotatable cam to the tip of the first latch, and the second latch includes a second arm connecting the rotatable cam to the tip of the second latch, so that the rotation of the rotatable cam causes the tip of the first latch and the tip of the second latch to rotate, respectively.
12. The substrate container according to claim 1, wherein the substrate container is a front-opening type unified pod.
13. A door for a substrate container, wherein the door is A door housing including a first side and a second side, A locking mechanism configured to secure the door into the opening of the shell of the substrate container via one or more first latch sockets and one or more second latch sockets located within the door housing and on the opposite side of the door frame of the shell, and The first locking mechanism is provided, A first latch having a first latch tip configured to rotate so as to extend through the first side surface of the door housing, wherein the first latch tip has a width configured so as to be inserted into one or more first latch openings, A second latch having a second latch tip configured to rotate so as to extend through the second side surface of the door housing, wherein the second latch tip has a width that allows it to be inserted into one or more second latch sockets, and the first socket of the one or more first latch sockets has a width that prevents the second latch tip from being inserted into the one or more first latch sockets. Doors, including
14. The door according to claim 13, wherein the door is configured to be insertable into the door frame in a first orientation and a second orientation, the door in the first orientation is rotated 180 degrees relative to the second orientation, and the locking mechanism is configured to attach the door in the first orientation to the door frame.
15. The door according to claim 14, wherein, in the second orientation, the locking mechanism is configured such that insertion of the second latch tip into the first socket of the one or more first latch sockets is prevented by the second latch tip contacting at least one of the ribs and end walls of the first socket of the first latch socket.
16. The width of the tip of the first latch is the width of the end face of the tip of the first latch. The door according to claim 13, wherein the width of the tip of the second latch is the width of the end face of the tip of the second latch.
17. The door according to claim 13, wherein the first latch tip includes an engaging member and a pivot member extending in different directions, the engaging member having the width of the first latch tip, and rotation of the first latch tip moves the engaging member to extend through an opening in the first side of the door, and the pivot member is pressed against the inner surface of the door and rotates the first latch tip.
18. The door according to claim 13, wherein the locking mechanism includes a rotatable cam, the first latch includes a first arm connecting the rotatable cam to the tip of the first latch, and the second latch includes a second arm connecting the rotatable cam to the tip of the second latch, so that the rotation of the rotatable cam causes the tip of the first latch and the tip of the second latch to rotate, respectively.
19. A method for closing a substrate container, Inserting a door into the opening of the substrate container, wherein the substrate container includes a shell defining an internal space, the shell having the opening defined by a door frame including one or more first latch sockets and one or more second latch sockets, and the door including a first locking mechanism including a first latch and a second latch. Adjusting the first locking mechanism from the unlocked position to the locked position, which includes rotating the first latch tip of the first latch so that it extends through the first side surface of the door, and rotating the second latch tip of the second latch so that it extends through the second side surface of the door. This includes adjusting the first locking mechanism, In the first orientation of the door in the opening, the tip of the first latch is inserted into one or more of the first latch sockets, and the tip of the second latch is inserted into one or more of the second latch sockets, In the second orientation of the door in the opening, the first width of the one or more first latch sockets prevents the tip of the second latch from being inserted into the one or more first latch sockets, thereby preventing the first locking mechanism from reaching the locked position. A method configured to perform an action.
20. The first latch tip has a width that allows it to be inserted into both the one or more first latch sockets and the one or more second latch sockets. The method according to claim 19, wherein the tip of the second latch has a width that allows it to be inserted into one or more second latch sockets, but does not allow it to be inserted into one or more first latch sockets.