Patent ID: 12255084

While the disclosure is amenable to various modifications and alternative forms, specifics thereof have been shown by way of example in the drawings and will be described in detail. It should be understood, however, that the intention is not to limit aspects of the disclosure to the particular illustrative embodiments described. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the disclosure.

DETAILED DESCRIPTION

As used in this specification and the appended claims, the singular forms “a”, “an”, and “the” include plural referents unless the content clearly dictates otherwise. As used in this specification and the appended claims, the term “or” is generally employed in its sense including “and/or” unless the content clearly dictates otherwise.

The term “about” generally refers to a range of numbers that is considered equivalent to the recited value (e.g., having the same function or result). In many instances, the term “about” may include numbers that are rounded to the nearest significant figure.

Numerical ranges expressed using endpoints include all numbers subsumed within that range (e.g. 1 to 5 includes 1, 1.5, 2, 2.75, 3, 3.80, 4 and 5).

The following detailed description should be read with reference to the drawings in which similar elements in different drawings are numbered the same. The detailed description and the drawings, which are not necessarily to scale, depict illustrative embodiments and are not intended to limit the scope of the invention. The illustrative embodiments depicted are intended only as exemplary. Selected features of any illustrative embodiment may be incorporated into an additional embodiment unless clearly stated to the contrary.

A semiconductor device is formed by fabricating a wafer substrate. One or more wafer substrates, or simply wafers, can be stored within a wafer carrier during, before, or after fabrication. The front opening substrate container protects the wafer(s) within the wafer carrier during storage or transport. For example, a wafer carrier protects the wafer(s) from damage caused by impacting other objects and from impacting each other. For example, a wafer carrier may be configured to minimize or prevent contaminated air from entering the wafer carrier when the front of the wafer carrier is closed. The wafer carrier has a size and weight that allows for a person (e.g., a technician, handler, etc.) to carry it between locations.

The wafer carrier may be, for example but not limited to, a front opening unified pod (FOUP) or a front opening shipping box (FOSB). Generally, a FOUP is used to transport substrate wafers within a manufacturing facility, while a FOSB is used for transporting substrate wafers across longer distances (e.g., between manufacturing facilities, from a manufacturing facility to another facility). For example, a FOUP may be configured to prevent contaminated air from entering the FOUP when the front of the FOUP is open. For example, a FOUP may also be configured to selectively allow gases into the FOUP, such as, but are not limited to, processes gas for fabrication or filtered gas for creating a positive air pressure within the FOUP.

Embodiments disclosed are directed to a wafer carrier that includes handles. The handles allow a person to safely carry the wafer carrier. Advantageously, the wafer carrier disclosed includes handles having, among other features, a locking mechanism and rails that reduce the risk of accidental detachment of the handles and reduce an amount of flexion/deformation of the wafer carrier when carried, thereby increasing a security of the contents of the wafer carrier.

The locking mechanism prevents the accidental removal of the handles from the wafer carrier. The handles advantageously can be installed with a force applied to the wafer carrier that is relatively lower than prior configurations, which can, for example, result in damage to the wafer carrier. The handles in this disclosure allow for a structure with increased strength over integrally formed handles and for separate cleaning of the handle that increases wafer carrier cleanliness.

FIGS.1-4show a wafer carrier according to an embodiment. The wafer carrier shown inFIGS.1-4is an embodiment of a wafer carrier1.FIG.1is a right perspective view of the wafer carrier1.FIG.2is a left perspective view of the wafer carrier1.FIG.3is a front view of the wafer carrier1.FIG.4is a side view of the wafer carrier1. According to various embodiments wafer carrier1can be a FOUP. In other embodiments, wafer carrier1can be a FOSB.

The wafer carrier1includes a first handle100A, a second handle100B (FIG.2), a first locking mechanism150A for the first handle100A (FIG.4), and a second locking mechanism150B for the second handle100B (FIG.2).

Each handle100A,100B are preferably configured to be non-destructively detachable. The handles100A,100B have the same structure and are configured to be attached or detached in the same manner, except for being mirror images of each other. Features of the first handle100A and first locking mechanism150A are described and labeled in the drawings with the suffix “A”, while features of the second handle100B and the second locking mechanism100B are described and labeled in the drawings with the suffix “B”. Unless specifically described or shown otherwise, it should be understood that the handle100B and locking mechanism150B include a corresponding “B” feature for each “A” feature described or shown for the handle100A and the locking mechanism150A, respectively.

The wafer carrier1includes a front door7, and a top10, a right side12(FIGS.1and4), a left side14(FIG.2), a rear16, and a bottom18that are generally referred to as sides10,12,14,16,18. The front door7and sides10,12,14,16,18form an enclosed internal space6(FIG.3). The wafer carrier1has a front opening9(FIG.2) at the front8of the wafer carrier1. The front door7covers the front opening7(FIG.1) and the wafer carrier1can be accessed by moving (e.g., opening, removing) the front door7.FIGS.2and3illustrate the wafer carrier1with the front door7removed (e.g., opened).

The sides10,12,14,16,18and the front door7, define an outer surface22of the wafer carrier1. In an embodiment, the sides10,12,14,16,18are a single integral structure. For example, the sides10,12,14,16,18may be molded as a single continuous piece of material or from multiple pieces that are permanently bonded together. In an embodiment, the wafer carrier1is made of a material that is generally unreactive and containment resistant (e.g., having low permeability) such as, but not limited to, a high purity polycarbonate.

As shown inFIG.3, wafer teeth20are disposed within the wafer carrier1for storing a plurality of wafers (not shown) in the internal space6. The wafers are inserted into the spaces of the wafer teeth20and stacked in a vertical direction with respect to the page within the wafer carrier1. In an embodiment, the wafer carrier1may include a different structure known for holding wafer(s) within the internal space6of the wafer carrier1other than the wafer teeth20shown. The front door7covers the front opening9of the wafer carrier1to enclose the internal space6. The wafers are protected within the internal space6by the wafer carrier1. The front door7is configured to seal with the sides10,12,14,18to prevent air from leaking into internal space6of the wafer carrier1and contaminating the stored wafers.

The top10includes an automation interface26and the bottom18includes a base24. The automation interface26may also be referred to as a top handling flange. In an embodiment, the automation interface26allows a standard automated attachment (not shown) for moving the wafer carrier1, such as but not limited to an automated arm, to be connected to the wafer carrier1. For example, the automated arm may be used to move the wafer carrier1between different fabrication equipment. The handles100A,100B are configured not to extend into the volume around the wafer carrier1typically reserved for the automated attachment. In an embodiment, the base24can be for connecting the wafer carrier1to different fabrication equipment.

In an embodiment, the wafer carrier1may include one or more ports28. For example, a port28may be an inlet for providing gas into the wafer carrier1(e.g., opened when a port28is fluidly connected to a fluid source) or an outlet (e.g., a purge) for allowing gas to flow out of the wafer carrier1. For example, a port28may be an inlet for creating a positive pressure within the wafer carrier1when the front door7is open or for circulating one or more process gases through the wafer carrier1in a fabricating step. For example, the base24is connected (e.g., placed on, attached, etc.) to the appropriate fabrication equipment (not shown) at the different fabrication steps, and gas is injected into and circulated through the wafer carrier1via the ports28.

The first handle100A is attached to one side12of the wafer carrier1(FIG.1) and the second handle100B is attached to a different side14of the wafer carrier1(FIG.2). The handles100A,100B allow for a person to carry the wafer carrier1between locations by hand.

The wafer carrier1is configured to prevent accidental detachment of the handles100A,100B. Each of the handles100A,100B includes a locking mechanism150A,150B (FIGS.2and4) configured to prevent accidental detachment of its respective handle100A,100B from the wafer carrier1. For example, the accidental detachment of a handle100A,100B from the wafer carrier1while being carried can cause the wafer carrier1to be dropped and the wafer(s) stored in the wafer carrier1to be damaged.

FIG.5is a right perspective view of the wafer carrier1with the handle100A detached. When attached (FIG.1), the handle100A extends along the side12of the wafer carrier1.

As shown inFIG.5, The wafer carrier1includes protrusions30A,40A, and rails50A,60A provided along the side12. The protrusions30A,40A each extend from the outer surface22of the wafer carrier1. The handle100A is secured to the wafer carrier1via the protrusions30A,40A, and the rails50A,60A. As shown inFIG.2, protrusions30B,40B and rails50B,60B are provided along the opposite side14of the wafer carrier1for securing the second handle100B to the wafer carrier1.

Apertures32A,42A are formed by the protrusions30A,40A. The aperture32A is defined by the protrusion30A and is located between the outer surface22of the wafer carrier1and an extent34A of the protrusion30A. The aperture42A is defined by the protrusion40A and is located between the outer surface22of the wafer carrier1and an extent44A of the protrusion40A. Each aperture32A,42A extends along the side12of the wafer carrier1from the front8to the rear16of the wafer carrier1.

FIGS.6A-6Care views of the handle100A according to an embodiment.FIG.6Ais a side view of the handle100A.FIG.6Bis a front view of the handle100A. For example,FIG.4andFIG.6Bare similar viewpoints of the handle100A.FIG.6Cis a rear view of the handle100A.

The handle100A includes a body110A with a first end112A and a second end114A. A grip120A is disposed between the first end112A and the second end114A of the body110A. As shown inFIG.6A, the grip120A has a first end122A that is closer to the first end112A of the body110A and a second end124A that is closer to the second end114A of the body110A.

When the handle100A is attached to the outer surface22of the wafer carrier1, the handle100A is configured for a person to grab the grip120A of the handle100A to carry the wafer carrier1. The grip120A is configured to be easy to grasp and handle when the handle100A is attached to the side12. For example as shown inFIGS.1and3, the grip120A is spaced apart from the side12and extends in a direction that allows for adequate space for a person to grab and hold the grip120A. As shown inFIGS.6A-6C, the grip120A defines a portion of the body110A of the handle100A.

In an embodiment, the grip120A may include a color indicator126A (FIG.6B). For example, a color indicator may be used to indicate the contents of the wafer carrier1(e.g., the specific type of wafer contained in the wafer carrier1, the current fabrication stage of the wafers in the wafer carrier1, or the like). In an embodiment, the color indicator126A may be integral to the body110A of the handle100A to avoid forming difficult cleaning surfaces (e.g., cracks, grooves, etc.) as the detachability of handles100A,100B allows for the handles100A,100B to be replaced when a different color indicator for the wafer carrier1is desired. For example, the color indicator126A in such an embodiment may be provided by coloring of the body110A itself or by a colored material being integrally formed in the body110A.

The handle100A also includes a first insertable member130A and a second insertable member140A. As shown inFIG.6A, the first insertable member130A is located between the first end112A and the grip120A. In an embodiment, the first insertable member130A may be disposed at the end122A of the grip120A, at the first end112A, or between the first end112A and the grip120A. The insertable member130A includes a tab132A, a front side134A, and a back side136A that is opposite the front side134A. The tab132A is on the front side134A of the insertable member130A and extends away from the front side134A of the insertable member130A. The insertable member130A has an end138A (FIGS.6B and8C) that is opposite to the body110A. In an embodiment, the tab132A is located on the front side134A of the insertable member130A closer to the end138A than to the body110A. For example, the tab132A is located on the front side134A and extends along the end138A.

As shown inFIG.6A, the second insertable member140A is disposed between the grip120A and the second end114A. In an embodiment, the second insertable member140A may be disposed at the end124A of the grip120A, at the second end114A, or between the second end114A and the grip120A. Similar to the first insertable member130A, the second insertable member140A also includes a tab142A, a front side144A, and a back side146A. In an embodiment, one or both of the first insertable member130A and the second insertable member140A may be integral with the body110A (e.g., formed as a single continuous piece of material). For example, handle100A when molded (e.g., injection molded) includes at least the body110A and the insertable member130A formed as a single piece. In such an embodiment, the insertable member130A is formed to have the desired amount of flexibility relative to the body110A for allowing attachment and detachment of the handle100A as described below.

In an embodiment, the insertable members130A,140A are located along portions of the body110A different from the grip120A (i.e., not located along the grip120A). This can provide space for grabbing the grip120A and can help prevent a person from accidentally contacting one of the insertable members130A,140A when handling the grip120A. For example, such accidental contact may eventually damage or loosen the insertable members130A,140A.

The handle100A also includes a first projection170A and a second projection180A. The first projection170A is located at the first end112A of the body110A. As shown inFIG.4, the first projection170A is configured to be even or below the outer surface22of the top10of the wafer carrier1, when the wafer carrier1is viewed from the side. For example, the first projection170A is configured not to extend above the outer surface22of the top10of the wafer carrier1. This prevents the projection170A from interfering with the space in which the standard automated attachment operates when attaching to the automation interface26or when attached to the automation interface26. The second projection180A is located at the second end114A of the body110A. The first projection170A is configured to engage first rail50A of the wafer carrier1. The second projection180A is configured to engage with the second rail60A of the wafer carrier1.

FIG.1shows the handle100A attached to the outer surface22of the wafer carrier1whileFIG.5shows the handle100A when detached. As shown by comparingFIGS.1and5, the handle100A is attached by moving the detached handle100A (as shown inFIG.5) in a first direction D1relative to the wafer carrier1. In an embodiment, the first direction D1extends from the rear16to the front8of the FOUP. For example, the first direction D1may be generally parallel to the side12of the wafer carrier1. As the handle100A is moved in the first direction D1relative to the wafer carrier1, each of the insertable members130A,140A is inserted into its corresponding aperture32A,42A and each projection170A,180A is engaged with a corresponding one of the rails50A,60A. The inserted insertable members130A,140A and engaged projections170A,180A secure the handle100A to the wafer carrier1. Detachment of the attached handle100A (as shown inFIG.4) includes moving the handle100A in a direction D2opposite the first direction D1. Detachment of the attached handle100A is described in more detail below.

The insertable member130A is configured to flex relative to the body110A (i.e., bend relative to the body110A). More specifically, the insertable member130A is configured to flex in a direction perpendicular to the direction D1in which it extends from the body110A (e.g., in a direction into or out of the page inFIG.6B). In an embodiment, this flexible configuration allows for (repeated) flexion of insertable member130A towards and away from the outer surface22of the wafer carrier1. In an embodiment, when the insertable member130A is inserted into the aperture32A, the tab132A contacts the protrusion30A and the insertable member130A is forced to flex towards the outer surface22of the wafer carrier1for the insertable member130A to fit into the aperture32A. For example, the flexion of the insertable member130A allows for the insertion of the insertable member130A into the aperture32A. Accordingly, as the insertable member130A is moved to and into the aperture32A, the tab132A contacts the protrusion30A which applies a pressure to the insertable member130A and flexes the insertable member130A towards the outer surface22of the wafer carrier1.

Once the tab132A passes through the aperture32A, the tab132A is flexed to be farther away from the outer surface22of the wafer carrier1. More specifically, the tension of the flexed insertable member130A flexes the tab132A to be farther away from the outer surface22of the wafer carrier1. The flexing of the tab132A puts the tab132A into an engaged state. The tab132A in the engaged state retains the insertable member130A in the aperture32A. More specifically, the tab134A in its engaged state prevents the insertable member130A from being removed from the aperture32A. The tab132A prevents removal of the insertable member130A by contacting the front outer surface36A (FIG.4) of the protrusion30A when the handle100A moved (e.g., pulled) in the direction D2opposite to the insertion direction D1. For example, the tab132A is hooked on front outer surface36A of the protrusion30A. As shown inFIG.4, the front outer surface36A faces away from the body110A of the handle100A (e.g., in direction D1).

In an embodiment, the tab132A also has an unengaged state. The tab132A is configured to allow removal of the insertable member130A from the aperture32A when in the unengaged state. For example, the tab132A in the unengaged state allows movement of the insertable member130A relative to the protrusion30A in the direction D2opposite to the insertion direction D1. In an embodiment, the wafer carrier1is configured to allow detachment of the handle100A when all of the tab(s)132A,142A of the insertable member(s)130A,140A of the handle100A are in the unengaged state.

The movement of the handle100A that inserts the insertable member130A into the apertures32A (e.g., the movement in the first direction D1) also moves the first projection170A relative to the first rail50A and the second projection180A relative to the second rail60A. More specifically, this movement of the handle100A causes the first projection170A to engage the first rail50A and the second projection180A to engage the second rail60A. The engagement of each projection170A,180A with its corresponding rail50A,60A is configured to prevent movement of the handle100A away from the wafer carrier1(e.g., direction D3inFIG.3). For example, the engagement of a projection170A,180A, with its rail50A,60A can mitigate force(s) that pull the handle100A away from the side12of the wafer carrier1and outward deflection of the side12by distributing pulling forces to the corners of the wafer carrier1.

The insertable member140A and tab142A are inserted in corresponding protrusion40A and aperture42A of the wafer carrier1in a similar manner to the insertable member130A and the tab132A. In an embodiment, the handle100A may be configured such that the one movement in the first direction D1of the handle100A inserts the insertable members130A,140A and engages the projections170A,180A. In an embodiment, the handle100A may be configured such that the one movement in the first direction D1of the handle100A inserts the insertable members130A,140A, moves the tabs132A,142A into an engaged state, and engages the projections170A,180A.

FIG.7is a perspective view of a locking mechanism150A according to an embodiment. The locking mechanism150A is configured to prevent unintended detachment of the handle100A from the wafer carrier1. For example, the locking mechanism150A when in a locked state is configured to ensure that that accidental contact with an insertable member130A,140A or a force on the handle100A (e.g., weight of a full wafer carrier1, jostling of the wafer carrier1, etc.) are unable to force the tab132A from its engaged state.

The locking mechanism150A includes a front end152A, a rear end154A, a contact surface156A, and a flexible extension160A. The locking mechanism150A also has a length L that extends from the front end152A to the rear end154A. The contact surface156A is located between the front end152A of the locking mechanism150A and the flexible extension160A. In an embodiment, a largest thickness T1of the locking mechanism150A between the front end152A and the flexible extension160A is at the contact surface156A. The thickness T1of the locking mechanism150A is perpendicular to its length L.

As shown inFIG.4, the locking mechanism150A is retained in a guide116A of the body110A of the handle100A. The locking mechanism150A is retained in the guide116A so as to be slidably attached to the body110A. For example, the guide116A allows the locking mechanism150A to move along the first direction D1while preventing the locking mechanism150A from moving in directions perpendicular to the first direction D1(e.g., direction D3, direction D4inFIG.3, etc.). In an embodiment, the locking mechanism150A includes an upper restriction164A and a lower restriction166A (FIG.7). The locking mechanism150A is slidably attached to the body110A of the handle100A by the guide116A and the two restrictions164A,166A. The upper restriction164A is positioned above the guide116A (e.g., in a direction out of the page inFIG.4, the guide116A closer to the outer surface22than upper restriction164A inFIG.4) and the lower restriction166A is positioned below the guide116A (e.g., the lower restriction166A closer to the outer surface22than the guide116A inFIG.4). For example, when the handle100A is viewed from side (e.g., the view inFIG.6A), the guide116A is positioned between the upper restriction164A and the lower restriction166A. In an embodiment, one upper restriction164A and one lower restriction166A may be provided along each side of the locking mechanism150A.

In an embodiment, one of the restrictions166A is bendable (e.g., bendable in a direction of the width W) to allow the locking mechanism150A to be formed separately from the handle100A and then snapped into the guide116A. The restrictions164A,166A are configured to prevent removal of the locking mechanism150A after being snapped into the guide116A. In another embodiment, the handle100A may be formed (e.g., molded, etc.) with the locking mechanism150A integral with the body110A and in the guide116A, and a portion connecting the locking mechanism150A to the body110A formed to be broken so that the locking mechanism150A becomes slidably attached to the body110A.

The body110A of the handle100A includes a through-hole118A and a retaining space119A. In an embodiment, the retaining space119A is provided in a rear102A (FIG.6A) of the body110A that faces the outer surface22of the side12of the wafer carrier1when the handle100A is attached. For example, when the handle is100A is attached to the side12of the wafer carrier1, the retaining space119A is located between the body110A and the outer surface22of the side12of the wafer carrier1. The through-hole118A connects to the retaining space119A. The through-hole118A is adjacent to the insertable member130A between the ends112A,114A of the body110A of the handle100A. The retaining space119A is located between the through-hole118A and the insertable member130A. The locking mechanism150A is configured to extend through the through-hole118A into the retaining space119A.

As shown inFIGS.6A and6C, the retaining space119A is open along the rear102A of the handle100A. However, in an embodiment, the retaining space119A may be enclosed along the rear102A of the handle100A. For example, in such an embodiment, a through-hole may extend through the body110A, and the retaining space119A may be a larger volume within the through-hole.

FIG.8Ais a sectional view of the wafer carrier1along the line VIII-VIII inFIG.3.FIG.8Bis an enlarged view of area B inFIG.8A.FIG.8Cis an enlarged view of area C inFIG.8A. The area B as shown inFIG.8Bis inverted and rotated and the area C as shown inFIG.8Cis rotated relative toFIG.8Afor clarity and easier comparison.

The locking mechanism150A has a locked state and an unlocked state. Each of the handles100A,100B includes a locking mechanism150A,150B (FIGS.1and2). The locking mechanism150A for the first handle100A is shown inFIGS.8A and8Cin the locked state. The locking mechanism150B of the second handle100B is shown inFIGS.8A and8Bin the unlocked state. The locking mechanism150B inFIG.8Bis moved from its unlocked state to the locked state (which is shown by the locking mechanism150A inFIG.8C) by moving in the first direction D1. The locking mechanism150A inFIG.8Cis moved from its locked state to the unlocked state (which is by shown by the locking mechanism150A inFIG.8B) by applying a force to the flexible extension160A and then moving the locking mechanism150A in the opposite direction D2.

The locking mechanism150A is configured to be moveable relative to the insertable member130A. For example, the locking mechanism150A is selectively moveable as the flexible extension160A inhibits the movement of the locking mechanism150A in the locked state until acted upon by an external force, as discussed in further detail below.

InFIG.8B, the locking mechanism150B is in the unlocked state. The locking mechanism150B in the unlocked state allows the tab132B to be moved from its engaged state. For example, the locking mechanism150B allows the insertable member130B to flex by an amount that moves the tab132B from the engaged state. The contact surface156B of the locking mechanism150B may still contact the back surface136B of the insertable member130B when in the unlocked state. In another embodiment, the contact surface156B may not contact the insertable member130B when in the unlocked state. The locking mechanism150B in its unlocked state allows the insertable member130B to be flexed away from the protrusion30B, which disengages the tab132B from the protrusion30B. In an embodiment, the locking mechanism150B is in the locked state when the flexible member160B is disposed external to the retaining space119B. The locking mechanism150B is moved in the direction D1and moves into the locked state when the flexible member160B is located in the retaining space119B.

InFIG.8C, the tab132A is in the engaged state and the locking mechanism150A is in the locked state. For example, the tab132A inFIG.8Cis positioned to contact the front outer surface38A of the protrusion30A when the handle100A is moved (e.g., pulled) in the direction D2, which prevents the insertable member130A from being removed from the aperture32A. The locking mechanism150A in the locked state is configured to maintain the tab132A in the engaged state. The tab132A extends from the insertable member130A in a first direction D3, and is moved out of the engaged state by moving in the opposite direction D4. The position of the locking mechanism150A in the locked state prevents the tab132A from moving from the engaged state. The position of the contact surface156A of the locking mechanism150A in the locked state limits the tab132A from moving in the opposite direction D4by limiting the flexion of the insertable member130A. For example, the position of the contact surface156A of the locking mechanism150A in the locked state prevents removal of the tab132A from the engaged state. In an embodiment, the contact surface156A of the locking mechanism150A contacts the insertable member130A when the locking mechanism150A is in the locked state. This contact by the locking mechanism150A prevents flexion of the insertable member130A. In an embodiment, the locking mechanism150A may maintain the tab132A in the engaged state without contacting the insertable member130A. For example, a minimum amount of flexion of the insertable member130A is necessary to move the tab132A from the engaged state. The contact surface156A of the locking mechanism150A in the locked state prevents the insertable member130A from reaching the minimum amount of flexion.

The locking mechanism150A extends into the aperture32A and along the back side136A of the tab132A. The insertable member130A is disposed between the contact surface156A of the locking mechanism150A and the inner surface38A of the protrusion30A. The thickness T1of the locking mechanism150A maintains the tab132A in the engaged state by limiting the flexion of the insertable member130A. The thickness T1of the locking mechanism150A inFIG.8Cstops the insertable member130A from flexing and moving the tab132A. The thickness T1extends perpendicular to the direction D1in which the insertable member130A extends from the body110A of the handle100A into aperture32A.

The flexible extension160A is configured to be flexible by an external force F1(e.g., bendable relative to the rest of the locking mechanism150A). For example, the external force F1can be applied by a person wanting to move the locking mechanism150A. The retaining space119A can prevent accidental contact from applying the external force F1to the flexible extension160A. The positioning of the flexible extension160A prevents movement of the locking mechanism150A in the direction D2opposite to the first direction D1.

The locking mechanism150A is selectively movable as the flexible extension160A is configured to limit movement of the locking mechanism150A from the locked state unless flexed by the external force F1. The locking mechanism150A moves from the unlocked state to the locked state by moving in the direction D1. The movement of the locking mechanism150A in the first direction D1moves the flexible extension160A through the through-hole118A and into the retaining space119A. In an embodiment, the locking mechanism150A enters the locked state when the flexible extension160A is positioned in the retaining space119A.

The size of the retaining space119A relative to the through-hole118A allows the flexible extension160A to at least partially un-flex. The normal geometry of the flexible extension160A within the retaining space119A (i.e., when not being acted on by the external force F1) is unaligned (e.g., match, fit within) with the through-hole118A in the direction D2. This non-alignment prevents the flexible extension160A from fitting into the through-hole118A and prevents movement of the locking mechanism150A in the direction D2that would move the locking mechanism150A from the locked position. Thus, the position of the flexible extension160A in the retaining space119A maintains the locking mechanism150A in the locked state. The external force F1flexes the flexible extension160A and causes the flexible extension160A to align with the through-hole119A in the direction D2, which allows the flexible extension160A to fit into the through-hole118A. Accordingly, the locking mechanism150A is moved from the locked state to the unlocked state by applying the external force F1to the flexible extension160A and moving locking mechanism150A in the direction D2, which moves the flexible extension160A into the through-hole118A from the retaining space119A. In an embodiment, the locking mechanism150A enters the unlocked state when the flexible extension160A is positioned outside of the retaining space119A. In an embodiment, the locking mechanism150A enters the unlocked state when the flexible extension160A is positioned outside both the through-hole118A and the retaining space119A.

In an embodiment, the non-alignment of the flexible extension160A with the through-hole118A in the second direction D2is caused by the width W of the locking mechanism150A. As shown inFIG.7, the locking mechanism150A has a width W defined by the flexible extension160A. In an embodiment, the flexible extension160A is configured to be flexed by the external force F1such that the width W of the locking mechanism150A is changed (e.g., reduced). For example, the locking mechanism has a width W1when the external force F1flexes the flexible extension160A. In an embodiment, the external force F1may compress the flexible extension160A to reduce the width W of the locking mechanism150A. The flexible extension160A is configured to be compressed without being permanently deformed.

As shown inFIG.6B, the through-hole118A has a width W2and the retaining space119A has a width W3. The width W3of the retaining space119A is greater than the width W2of the through-hole118A. When the locking mechanism150A is moved from the unlocked position (as shown by the locking mechanism150B inFIG.8B) to the locked position (as shown by the locking mechanism150A inFIG.8C), the flexible extension160A moves from the through-hole118A into the retaining space119A. The larger width W3of the retaining space119A (relative to the width W2of the through-hole118A) allows the flexible extension160A to at least partially un-flex in the retaining space119A. This un-flexing of the flexible extension160A causes the width W of the locking mechanism150A (e.g., along the flexible extension160A) to be larger than the width W2of the through-hole118A. Thus, the normal width W of the locking mechanism150A in the locked state (i.e., when not being acted on by the external force F1) is greater than the width W2of the through-hole118A. When the external force F1flexes the flexible extension160A, the width W1of the locking mechanism150A is equal to or smaller than the width W2of the through-hole118A. Accordingly, the locking mechanism150A moves from the unlocked state to the locked state by flexing the flexible extension160A to reduce the width W of the locking mechanism150A and then moving the locking mechanism150A in the second direction D2.

Accordingly, when disposed in the retaining space119A, the geometry of the flexible extension160A maintains the locking mechanism150A in the locked state. For example, when the locking mechanism150A is moved from the unlocked state to the locked state by moving in the first direction D1, the geometry of the flexible extension160A in the retaining space119A then prevents the locking mechanism150A from being moved in the opposite direction D2. In an embodiment, the geometry of the flexible extension160A that maintains the locking mechanism150A in the locked state is the width W of the locking mechanism150A as described above.

The flexible extension160A may be flexed to move the locking mechanism150A from the unlocked state to the locked state. In an embodiment, one or both of the through-hole118A and the flexible extension160A may configured so that the force that moves the locking mechanism150A in the first direction D1also flexes the flexible extension160A to fit through the through-hole118A. For example, when in the unlocked state, one or more of the surface(s) of the through-hole118A and the surface(s) of the flexible extension160A that face each other when the locking mechanism150A is in the unlocked position may be sloped.

The upper surface158A of the locking mechanism150A is generally flat relative to the insertable member130A. However, the locking mechanism150A, in an embodiment, may have a concave upper surface158A and a length L that positions the contact surface156A external to the aperture32A when the flexible extension160A is disposed in the retaining space119A. The convex shape of the upper surface158A allows for a sufficient flexion of the insertable member130A to move the tab132A from its engaged state to the unengaged state. In such an embodiment, the locking mechanism150A may be moved from its locked state to the unlocked state by moving in the direction D2opposite of the first direction D1. The locking mechanism150A is in the unlocked state when the flexible extension160A is disposed in the retaining space119A, and is in the locked state when the flexible extension160A is disposed external to the retaining space119A. In such an embodiment, the flexible extension160A may be configured to inhibit movement of the locking mechanism150A in the direction D1when in the locked state as similarly discussed above except with respect to movement in direction D2. For example, the flexible extension160A in such an embodiment is prevented from being inserted into the through-hole118A in the same manner as discussed above, except with respect to direction D1instead of direction D2.

As shown inFIGS.4and8C, when the handle100A is pulled in the detachment direction D2, the tab132A in the engaged state is configured to contact the front outer surface38A of the protrusion30A to prevent removal of the insertable member130A from the aperture32A. However, in an embodiment, a notch (not shown) may be provided within the aperture32A, and the tab132A may be configured to prevent removal of the insertable member130A by engaging with said notch. For example, the notch may be provided in the inner surface38A of the protrusion30A or the outer surface22of the wafer carrier1. In such an embodiment, the insertable member130A may only partially extend through the aperture32A. In such an embodiment, a portion of the locking mechanism150A when in its locked state may be disposed between the protrusion30A and insertable member130A. In an embodiment, the tab132A may extend from the insertable member130A in a different direction than away from the outer surface22of the wafer carrier1(e.g., different from direction D3inFIG.8C). For example, the tab132A in an embodiment may extend from the insertable member130A towards the outer surface22(e.g., in direction D4, etc.) of the wafer carrier1or in a direction perpendicular to the direction away from the outer surface22of the wafer carrier1(e.g., in direction D5inFIG.9, etc.)

As discussed above, the insertable member130A is configured to automatically flex the tab132A into the engaged state when inserted through aperture32A. However, in an embodiment, the insertable member130A may not be configured to flex the tab132A into the engaged state. In an embodiment, the locking mechanism150A may flex the insertable member130A to flex the tab132A into the engaged position. For example, the tab132A may be on the front surface134A of the insertable member130A and the insertable member may need to be flexed in the second direction D2to flex the tab132A into the engaged state. The locking mechanism150A when moved into the locked state may be configured to push the insertable member130A in the second direction D2to flex the tab132A into the engaged state.

FIG.9is a sectional view of a portion of the wafer carrier1along the line IX-IX inFIG.4. The first projection170A of the handle100A is engaged with the first rail50A of the wafer carrier1. More specifically, the first projection170A is configured to interlock with the first rail50A.

The projection170A includes a first portion172A and a second portion174A that is directly connected to the first portion172A. The first portion172A extends away from the body110A of the handle100A in a first direction D4, and the second portion174A extends away from the first portion172A in a different direction D5. The direction D4of the first portion172A is not planar with the first end112A of the body110A. In an embodiment, the first rail50A extends away from the outer surface22of the side12of the wafer carrier1. The first rail50A includes an inner surface52A and a slot54A. The slot54A is defined by the inner surface52A. The projection170A extends into the slot54A of the rail50A. Contact between the inner surface52A and the rail50A and the second portion174A of the projection170A is configured to prevent movement of the attached handle100A away from the outer surface22of the wafer carrier1(e.g., movement in direction D3). The second rail60A and second projection180A have a similar structure and engagement as described for the first rail50A and the first projection180A, except being rotated as the projection rail180A is disposed along the second end114A of the handle100A.

As shown inFIG.3, the wafer teeth20are attached to the sides12,14of the wafer carrier1. A force pulling on the handle100A (e.g., in direction D3) can cause the side12to outwardly deflect, which can affect the form of the wafer teeth20and damage the wafers in the wafer teeth20. For example, the rails50A,60A and projections170A,180A provide more rigid contact points (e.g., at or near the corners) for attaching the handle100A to outer surface22of the wafer carrier1. The more rigid contact points can help mitigate outward deflections of the side12by distributing pulling forces from the handle100A to the corners of the wafer carrier1.

The slot54A defined by the first rail50A faces upward inFIG.9(i.e., in direction D5). However, in an embodiment, directions of the first rail50A and the second portion174A may be revered. For example, in such an embodiment, the slot54A may face downward (i.e., opposite the direction D5). In an embodiment, the second rail60A and the second projection180A may also be modified in such a manner.

The handle100A of the wafer carrier1has two insertable members130A,140A, two rails170A,180A, and one locking mechanism150A. However, the handle100A in an embodiment may have a different number of insertable members130A,140A, rails170A,180A, and locking mechanisms150A. In an embodiment, the handle100A may include one or more of insertable members130A,140A. In an embodiment, the handle100A may include one or more rails170A,180A. In such embodiments, the wafer carrier1may include a corresponding number of protrusions30A,40B and rails50A,60A. In an embodiment, the wafer carrier1may include multiple of the locking mechanisms150A for the handle100A. For example, the wafer carrier1in an embodiment may have each of the insertable members130A,140A of the handle100A provided with a respective locking mechanism.

The handles100A,100B and locking mechanisms150A,150B shown inFIGS.1-9and described above are for a wafer carrier1. However, it should be appreciated that the handles100A,100B, locking mechanisms150A,150B, and protrusions30A,30B may be similarly applied to other types of wafer carrier such as, but not limited to, a front opening shipping box (FOSB) in a similar manner as shown and described for the wafer carrier1. In an embodiment, a front opening shipping box (FOSB) may include at least a protrusion30A,30B, a handle100A,100B, and a locking mechanism150A,150B for the handle100A,30B.

FIGS.10-12illustrate a locking mechanism350A according to another embodiment.FIG.10is a perspective view of a portion of a FOUP300.FIG.11is a front perspective view of the locking mechanism350A.FIG.12is a rear perspective view of the locking mechanism350A.

The FOUP300includes the handles100A,100B similar to the wafer carrier1inFIGS.1-5. Accordingly, the FOUP300also includes a second locking mechanism similar to the locking mechanism350A for the second handle100B of the wafer carrier1.

FIG.10shows the locking mechanism350A in the locked position. The locking mechanism350A is separate from the handle100A and wafer carrier1when in the unlocked position, and is moved to the locked position by coupling the locking mechanism to the handle350A. The locking mechanism350A has a locked state and an unlocked state. The locking mechanism350A moves from the unlocked state to the locked state by being coupled to the handle100A. When in the locked state, the locking mechanism350A maintains the tab138A of the insertable member130A in its engaged state. The tab132A is not labeled inFIG.10as it is obscured by the locking mechanism350A in the view ofFIG.10. More specifically, the locking mechanism350A in its locked state is configured to prevent movement of the tab138A that would remove the tab138A from its engaged state. The locking mechanism350A moves from the locked state to the unlocked state by being uncoupled from the handle350A.

As shown inFIGS.11and12, the locking mechanism350A has a front end352A, a rear end354A, an inner surface366A, and a length L2. The locking mechanism350A has a generally concave shape. The locking mechanism350A includes a first tab356A disposed at the front end352A and a second tab357A disposed at the rear end354A. The first tab356A and the second tab357A have a similar structure. The first tab356A and the second tab357A each extend from the inner surface366A of the locking mechanism350A. In an embodiment, the first tab356A and the second tab357A each extend from the inner surface366A in a direction parallel to the length L2of the locking mechanism350A. The locking mechanism350A is coupled to the handle100A with the first tab356A and the second tab357A.

When the locking mechanism350A is in its locked state, the first tab356A contacts the back side136A (shown inFIG.6C) of the insertable member130A and the second tab357A is inserted into the through-hole118A of the handle100A. For example, when in the locked state, the first tab356A is hooked on the end138A of the insertable member130A and the second tab357A is hooked in the through-hole118A. In an embodiment, the through-hole118A for the tab357A may instead be a blind hole. When coupled to the handle100A, the first tab356A presses against the back side136A of the insertable member130A. This pressure on the insertable member130A by the locking mechanism350A in the locked state prevents the insertable member130A from flexing towards the outer surface22of the wafer carrier1, and prevents movement of the tab132A from the engaged state. Thus, the locking mechanism350A maintains the engaged state of the tab132A.

The locking mechanism350A extends a length larger than its normal length L2(i.e., the length when no external force F2, F3is applied to the locking mechanism350A). The length for coupling to and coupling from the handle100A is larger than the length L2. The locking mechanism350A is configured to be flexible such that an external force (e.g., force F2, force F3) can increase the length L2of the locking mechanism350A. In an embodiment, a portion of the locking mechanism350A at the first end352A is a flexible extension353A. When no external force F2, F3is applied to the locking mechanism350A, the extendable extension353A keeps its geometry and maintains the length L2. The position of the extendable portion353A keeping the locking mechanism350A coupled to the handle100A. Accordingly, geometry of the extendable portion353A maintains the locking mechanism350A in its locked state.

When the locking mechanism350A is in its locked state it can be moved to its unlocked state (i.e. decoupled) by applying an external force (e.g., force F2, force F3) to the inner surface366A of the locking mechanism350A along the first end352A or the second end354A. For example, the external force F2, F3causes the extendable extension353A to extend and increases the length L2of the locking mechanism350A. The larger length L2decouples the locking mechanism350A from the handle100A.

The illustrated embodiment of the locking mechanism350A inFIGS.10-12is separate from the handle100A when in the unlocked state (i.e., decoupled from the handle100A in the unlocked state). However, in an embodiment, the handle100A and the locking mechanism350A may be a single integral piece. In such an embodiment, the rear end354A may be integrally connected with the body110A of the handle100A. The front end353A is flexible relative to the insertable member130A such that the front end353A is configured to be pulled away from the insertable member130A in direction D3to allow the protrusion30A to fit between the front end353A and the insertable member130A to detach the handle100A from the wafer carrier1.

The locking mechanism350A is shown inFIGS.10-12and described above as being for a FOUP300. However, it should be appreciated that the handle100A, the locking mechanism350A, and the protrusion30A may be similarly applied to other types of wafer carriers such as, but not limited to, a front opening shipping box (FOSB). In an embodiment, a wafer carrier may include a handle100A, a protrusion30A, and a locking mechanism350A for the handle100A in a similar manner as shown and described for the FOUP300. In an embodiment, the wafer carrier may include a pair of the protrusions30A,30B, a pair of the handles100A,100B, and a pair of the locking mechanisms350A.

FIGS.13-16illustrate a locking mechanism450A according to another embodiment.FIG.13is a perspective view of a portion of a FOUP400.FIG.14is a front perspective view of the locking mechanism450A.FIG.15is a rear perspective view of the locking mechanism450A.FIG.16is a partial sectional view of the FOUP400along the line XVI-XVI inFIG.13.

The FOUP400includes the detachable handles100A,100B similar to the wafer carrier1inFIGS.1-4. Accordingly, the FOUP400includes a second locking mechanism similar to the locking mechanism450A for the second handle100B of the wafer carrier1.

The locking mechanism450A has a locked state and an unlocked state.FIGS.13and16show the locking mechanism450A in the locked state. The locking mechanism450A moves from the unlocked state to the locked state by being inserted into the aperture32A in a direction D2opposite to the insertion direction D1of the insertable member130A into the aperture32A. The locking mechanism450A is moved from the locked state to the unlocked state by moving in the direction D1.

As shown inFIGS.14-16, the locking mechanism450A includes a front end452A, a rear end454A, a length L3, a lip453A, a biasing member458A, and a flexible extension460A. The flexible extension460A includes a first arm462A with a first tab463A and a second arm464A with a second tab465A. In an embodiment, the length L3of the locking mechanism450A extends parallel to the direction in which the insertable member130A extends from the body110A of the handle100A. The length L3of the locking mechanism450A is perpendicular to its thickness T2.

When the locking mechanism450A is in its locked state, the biasing member458A contacts the outer surface22of the wafer carrier1and pushes a contact surface456A into contact with the back side136A of the insertable member130A. The insertable member130A is pinched between the contact surface456A of the locking mechanism450A and the inner surface38A of the protrusion30A. The biasing member464A configured to provide the locking member450A with a thickness T2that prevents the flexing of the insertable member130A. The biasing member464A configured to provide the locking member450A with a thickness T2that prevents the flexing of the insertable member130A. In an embodiment, the biasing member464A is configured to provide the locking mechanism450A with a thickness T2that at least prevents the insertable member from flexing to the least amount that allows the tab132A to be moved from its engaged position. This prevents the insertable member130A from flexing the tab134A from its engaged state. Thus, the locking mechanism450A in its locked state maintains the engaged state of the tab134A.

The lip453A is located at the front452A of the locking mechanism450A. The lip453A is configured to limit how far the locking mechanism450A can be inserted into the aperture32A. The lip extends above the contact surface453A. When the locking mechanism450A is moved into the locked state, the lip453A contacts the end138A of the insertable member130A and prevents further the insertion of the locking mechanism450A. For example, the lip453A may prevent the locking mechanism450A from being fully inserted into or through the aperture30A.

The tabs463A,465A contact an inner surface121A of the handle100A when in the locked position and no external force F4is applied to the arms462A,464A. More specifically, the tabs463A,465A are hooked on one or more inner surface(s)121A of the handle100A. For example, the retaining space119A may define the inner surface121A of the handle100A. The contact of the tabs463A,465A on the inner surface(s) prevents the locking mechanism450A from moving in the first direction D1. The flexible extension460A is configured for an external force F4to flex the arms462A,464A closer together which reduces the width W4and moves the arms462A,464A away from their corresponding inner surface(s)121. For example, the external force F4may be applied by a person that wants to move the locking mechanism450A to the unlocked position.

Accordingly, the size and positioning of the arms462A,464A of the flexible extension460A maintains the locking mechanism in its locked position. For example, the width W4of the flexible extension460A along tabs463A,465A prevents movement of the locking mechanism450A from its locked state.

As shown inFIG.16, the contact surface456A is configured to push against the insertable member130A in the direction D3. However, as discussed above, the insertable tab132A in an embodiment be configured to extend from the insertable member130A in a direction different than away from the outer surface22of the wafer carrier1(e.g., different than direction D3). In such an embodiment, the locking mechanism450A may be configured to push against the insertable member130A in the appropriate direction so that the tab132A of the insertable member130A is maintained in its engaged state. For example, the locking mechanism450A may extend between the projection30A and the front side134A of the insertable member130A and be configured to push the insertable member130A towards the outer surface22of the wafer carrier1or be configured to push the insertable member130A in a direction perpendicular to the direction D1and the direction D3.

The locking mechanism450A is shown inFIGS.13-16and described above as being for a FOUP400. However, it should be appreciated that the handle100A, the locking mechanism450A, and the protrusion30A may be similarly applied to other types of wafer carriers such as, but not limited to, a front opening shipping box (FOSB).

FIGS.17-21show various embodiments of a wafer carrier500and handle510in accordance with another embodiment of the disclosure.

FIG.17is a side view of a wafer carrier500including handle510and locking mechanisms520A,520B in accordance with another embodiment of the disclosure. The wafer carrier500can be a FOUP or a FOSB, as described herein and can have many of the same features as wafer carrier1described herein. In one embodiment, wafer carrier500is a FOUP. Handle510includes many of the same features as handle100A, discussed above, with reference in particularly toFIGS.6A-6C. It will be appreciated by those of skill in the art that the wafer carrier500includes a second handle having the same features as handle510on the opposite side wall of the wafer carrier500which is not shown here for the sake of brevity.

As shown inFIG.17, handle510is engaged with rails50A,60A provided on the side wall506of the wafer carrier504. Rails50A,60A are previously described herein with such as, for example, rails50A,60A, best viewed inFIG.5. The handle510includes a handle body512and a first locking mechanism520A provided at an upper end524of the handle body512and a second locking mechanism520B provided at a lower end526of the handle body512. Each of the locking mechanisms520A,520B are configured to be retained within vertical guide530A,530B provided at each of the upper end524and the lower end526of the handle body512such that they are able to slide within vertical guides530A,530to transition from an unlocked state to a locked state. Locking mechanisms520A,520B can be retained in the locked state by retaining space519A,519B. InFIG.17, locking mechanism520A is depicted in an unlocked state and locking mechanism520B is depicted in the locked state.

FIGS.18A-18Cshow different views of the handle510.FIG.18Ashows handle510including locking mechanisms520A,520B each in the unlocked state.FIG.18Bis a front view of handle510with locking mechanism520A,520B removed such that vertical guides530A,530B in which locking mechanisms520A,520B are retained and transition from the unlocked state to the locked state are visible.FIG.18Cis a side view of handle510. Like handle100A, described herein, handle510includes upper protrusion580A and lower protrusion580B that are configured to engage and slide along rails50A,60A. Upper and lower protrusions580A,580B have a shape that is complementary to the shape of rails50A,60A. In some embodiments, upper and lower protrusions580A,580B have a downwardly extending L shape defining a guide582A,582B which facilitates upper and lower protrusions580A,580B to be retained on and slide along rails50A,60A.

FIG.19shows locking mechanism520A in isolation.FIGS.20A and20Bshow close up views of first locking mechanism520A provided at an upper end524of the handle body512and second locking mechanism520B provided at a lower end526of the handle body512, respectively.FIG.21is a cross sectional view showing locking mechanism520B in a locked state.

Locking mechanisms520A,520B are configured to prevent unintended detachment of the handle510from the wafer carrier500. Locking mechanisms520A,520B are configured to be retained in vertical guides530A,530B (best viewed inFIG.18B) so as to be able to slide within vertical guides530A,530B when transitioning from an unlocked state to a locked state.FIG.20Ashows locking mechanism520A in an unlocked state.FIG.20Bshows locking mechanism520B in a locked state.

Referring now toFIG.19, locking mechanism520A includes a first end552A and a second end554A and a flexible extension560A located between the first end552A and second end554A. Locking mechanism520includes upper restriction564A and lower restriction566A provided at a first end552A. In an embodiment, one upper restriction564A and one lower restriction566A may be provided along each side of the locking mechanism520A. In an embodiment, one of the restrictions566A is bendable (e.g., bendable in a direction of the width W) to allow the locking mechanism530A to be formed separately from the handle510and then snapped into the vertical guide530A. Upper and lower restrictions564A,566A are configured to prevent removal of the locking mechanism520A after being snapped into vertical guide530A.

As best viewed inFIGS.20A and20B, locking mechanisms520A,520B are slidably attached to the handle body512through interaction of the two restrictions564A,564B, and564A,566B with vertical guides530A,530B. Upper restrictions564A,564B are positioned above the upper surface of a wall defining vertical guides530A,530B and lower restrictions566A,566B is positioned below a lower surface of a wall defining vertical guides530A,530B, respectively, such that the walls defining vertical guides530A,530B are positioned between upper restrictions564A,564B and lower restrictions566A,566B of locking mechanism520A,520B.

Flexible extension560A is configured is configured to flex inwardly toward a center liner x from a first state having a first width to a second state having a second width with that is less than the first width in response to an applied force. In the second state, the flexible extension560A can be received within retaining space519A when locking mechanism520A is transitioned to the locked stated.

FIGS.20B and21are different views showing locking mechanism520B in the locked state. As previously indicated, locking mechanism520B includes the same features as locking mechanism520A described herein. As shown inFIGS.20B and21, flexible extension560B is retained within retaining space519B when locking mechanism520B is in the locked state. Upon release of the force applied to flexible extension560B, flexible extension can transition from the second state to the first state causing the flexible extension560B to be retained in the retaining space519B. To transition the locking mechanism520B from the locked state to the unlocked state, the force can be reapplied to the flexible extension560B so that that the flexible extension560B is in the second state and has a width that is less than a width of the retaining space519allowing for its removal.

Additionally, in some embodiments, second end554A is sized to be received and retained within a corresponding aperture provided in rail50A when locking mechanism520A is in the locked state. Locking mechanism520B is engaged with rail60A in the same manner. In some embodiments, rail60A can be provided with an aperture sized to receive and retain the second end of locking mechanism520B when locking mechanism520B is in the locked state.

FIGS.22-26show various views of a wafer carrier600and handle610in accordance with another embodiment of the disclosure. Wafer carrier600includes many of the same features as wafer carriers1and500described herein. Wafer carrier600can be a FOUP or a FOSB. In one embodiment, wafer carrier600is a FOUP.

FIG.22shows wafer carrier600including handle610prior to its attachment to rails50A,60A provided on the sidewall606of the wafer carrier600.FIG.23shows wafer carrier600include handle610attached to the side wall606of the wafer carrier. It will be appreciated by those of skill in the art that the wafer carrier600includes a second handle having the same features as handle610on the opposite side wall of the wafer carrier600which is not shown here for the sake of brevity.

As shown inFIG.23, handle510is engaged with rails50A,60A provided on the side wall606of the wafer carrier600. Rails50A,60A are previously described herein with such as, for example, rails50A,60A, best viewed inFIG.5. The handle610includes a handle body612and a first locking mechanism520A provided at an upper end624of the handle body612and a second locking mechanism620B provided at a lower end626of the handle body612. Locking mechanisms520A,520B are described in detail with reference toFIG.19. Each of the locking mechanisms520A,520B are configured to be retained within vertical guide630A,630B provided at each of the upper end624and the lower end626of the handle body612such that they are able to slide within vertical guides630A,630to transition from an unlocked state to a locked state.

In the embodiments shown inFIGS.22-26, retaining space619B and vertical groove630B are offset from a center line x2extending through the lower end626of the handle body612. In the prior embodiment, described with reference toFIGS.17-21, retaining space619B and vertical groove630B are centered with a center line x2extending through the lower end526of the handle body512. Rather than cooperating with an aperture provided in rail60, the second end554B of the locking mechanism524B abuts an end of rail60A, as will be described in greater detail below, when the locking mechanism524B is in the locked state. In some cases, retaining space619A and vertical groove630A located at an upper end624of handle610also can positioned on the upper end524of the handle body such that when the locking mechanism524A is in the locked state, the second end554A abuts an end of rail50A.

FIGS.24A-24Cshow different views of the handle610.FIG.24Ashows handle610including locking mechanisms520A,520B each in the unlocked state.FIG.24Bis a front view of handle610with locking mechanism520A,520B removed such that vertical guides630A,630B in which locking mechanisms520A,520B are retained and transition from the unlocked state to the locked state are visible.FIG.24Cis a side view of handle610. Like handles100A and510, described herein, handle610includes upper protrusion680A and lower protrusion680B that are configured to engage and slide along rails50A,60A. Upper and lower protrusions680A,680B have a shape that is complementary to the shape of rails50A,60A. In some embodiments, upper and lower protrusions680A,680B have a downwardly extending L shape defining a guide682A,682B which facilitates upper and lower protrusions680A,680B to be retained on and slide along rails50A,60A when the handle610is secured to the side wall606of wafer carrier600.

FIGS.25A and25Bare close-up views showing locking mechanisms520A,520B in the locked state. Locking mechanisms520A,520B can be retained in the locked state by retaining space619A,619B. Upon release of the force applied to flexible extensions560A,560B, flexible extensions560,560B can transition from the second state to the first state causing the flexible extensions560A,560B to be retained in the retaining spaces619A,619B. To transition the locking mechanisms520A,520B from the locked state to the unlocked state, the force can be reapplied to the flexible extensions560A,560B so that that the flexible extensions560A,560B are in the second state and has a width that is less than a width of the retaining spaces619A,619B allowing for their removal.

FIG.26is a partial cross-sectional view of the upper end624of the handle body612showing locking mechanism520A in the locked state and engaged with rail50A. As can be seen inFIG.26, flexible extension560A is received and retained within retaining space619A and the second end554A of locking mechanism520A abuts a distal end558of rail50A. This prevents the handle610from being inadvertently being backed off rail50A.

FIGS.27-30show various views of a wafer carrier700and handle710in accordance with another embodiment of the disclose. Wafer carrier700includes many of the same features as wafer carriers1,500, and600described herein. Wafer carrier700can be a FOUP or a FOSB. In one embodiment, wafer carrier700is a FOUP.

FIG.27shows wafer carrier700including handle710prior to its engagement with rails50A,60A provided on the sidewall706of the wafer carrier700.FIG.28shows wafer carrier700include handle710attached to the side wall7606of the wafer carrier700.FIG.30is a view of the handle710in isolation. It will be appreciated by those of skill in the art that the wafer carrier700includes a second handle having the same features as handle710on the opposite side wall of the wafer carrier700which is not shown here for the sake of brevity.

As shown inFIGS.28and29, handle710is engaged with rails50A,60A provided on the side wall706of the wafer carrier700. Rails50A,60A are previously described herein with such as, for example, rails50A,60A, best viewed inFIG.5. The handle710includes a handle body712and a first locking arm720A provided at an upper end724of the handle body712and a second locking arm720B provided at a lower end726of the handle body712. The distal ends760A,760B of each of locking arms720A,720are configured to engage a distal end758A,758B of each of rails50A,50B. In some embodiments, the distal end760A,760B can be configured as a barb, a catch or other protrusion that can engage with the distal ends758A,758B of rails50A,60A through retention forces (FIGS.28and29).

Each of locking arms720A,720B are flexible such that they can be flexed outward and away from the side of the carrier and ride along an outer surface750of each of the rails50A,60A as the handle710is attached to the wafer carrier700. Upon reaching a distal end758A,758B of rails50A,50B, each of the flexible arms720A,720B are configured to flex back inwardly toward the side wall706of the wafer carrier700such that a distal end760A,760B of each of the flexible arms720A,720B is engaged with and retained on a distal end758A,758B of each of rails50A,50B as best viewed inFIG.29.

Aspects: Any of aspects 1-13 can be combined with any of aspects 14-23.

Aspect 1. A handle for a wafer carrier, the wafer carrier including a protrusion extending from an outer surface of the wafer carrier, the protrusion defining an aperture between the outer surface of the wafer carrier and an extent of the protrusion for attaching the handle, the handle comprising: a body including: a first end and a second end opposite the first end, and an insertable member disposed between the first end and the second end of the body and configured to be inserted into the aperture to secure the handle to the wafer carrier, the insertable member including a tab that retains the insertable member in the aperture when in an engaged state and a locking mechanism moveable relative to the insertable member between a locked state and an unlocked state, the locking mechanism including a flexible extension, and in the locked state, the locking mechanism maintains the tab in the engaged state and the flexible extension positioned to maintain the locking mechanism in the locked state.

Aspect 2. The handle of aspect 1, wherein the handle is configured to be attached and non-destructively detached from the wafer carrier.

Aspect 3. The handle of either one of aspects 1 or 2, wherein the tab is disposed on a first side of the insertable member, and when in the locked state, the locking mechanism extends along a second side of the insertable member opposite to the first side.

Aspect 4. The handle of any one of aspects 1-3, wherein when in the locked state, a thickness of the locking mechanism maintains the tab in the engaged state.

Aspect 5. The handle of any one of aspect 1-4, wherein when the locking mechanism is in the locked state, a geometry of the flexible extension maintains the locking mechanism in the locked state.

Aspect 6. The handle of any one of aspects 1-5, wherein the flexible extension is configured to be flexible to a smaller geometry or a different position, and to allow movement of the locking mechanism from the locked state in response to an external force flexing the flexible extension to the smaller geometry or the different position.

Aspect 7. The handle of any one of aspects 1-6, wherein the body includes a guide disposed in the body adjacent to the insertable member, the locking mechanism retained by the guide such that the locking mechanism is slidably attached to the body.

Aspect 8. The handle of any one of aspects 1-7, wherein the insertable member is disposed at an end of the grip, at the first end, or between the grip and the first end.

Aspect 9. The handle of any one of aspects 1-8, further comprising: a projection extending from the first end of the body in a first direction and a second direction in that order, the first direction being away from the body and non-planar to the first end of the body, and the second direction different from the first direction, wherein the projection is configured engage a rail of the wafer carrier to secure the handle to the wafer carrier.

Aspect 10. The handle of any one of aspects 1-9, wherein the insertable member is flexible relative to the rest of the body, and the tab movable into the engaged state by the flexing of the insertable member.

Aspect 11. The handle of any one of aspects 1-10, wherein the locking mechanism extends through the body.

Aspect 12. The handle of any one of aspects 1-11, wherein the locking mechanism extends through a through-hole of the body, and when in the locked state, the flexible extension causes a width of the locking mechanism to be larger than a corresponding width of the through-hole.

Aspect 13. The handle of any one of aspects 1-12, wherein the body includes a grip disposed between the first end and the second end of the body.

Aspect 14. A wafer carrier, comprising: an outer surface; a protrusion extending from the outer surface, the protrusion defining an aperture between the outer surface and an extent of the protrusion; a handle attached to the outer surface via the aperture, the handle including: a body including a first end, a second end opposite the first end, and an insertable member disposed between the first end and the second end and extending into the aperture to secure the handle to the outer surface, the insertable member including a tab that retains the insertable member in the aperture when in an engaged state; and a locking mechanism moveable relative to the insertable member between a locked state and an unlocked state, the locking mechanism including a flexible extension, and when in the locked state, the locking mechanism maintains the tab in the engaged state and the flexible extension is positioned to maintain the locking mechanism in the locked state.

Aspect 15. The wafer carrier of aspect 14, wherein when in the locked state, the locking mechanism extends between the insertable member and the outer surface and a thickness of the locking mechanism maintains the tab in the engaged state.

Aspect 16. The wafer carrier of either one of aspect 14 and 15, wherein the insertable member extends into the aperture in a first direction, and the thickness of the locking mechanism extends in a second direction perpendicular to the first direction.

Aspect 17. The wafer carrier of any one of aspects 14-16, wherein when in the locked state, the locking mechanism extends between the insertable member and the outer surface.

Aspect 18. The wafer carrier of any one of aspects 14-17, wherein the insertable member is inserted into the aperture in a first direction, and the locking mechanism moves from the unlocked state to the locked state in a second direction parallel to the first direction.

Aspect 19. The wafer carrier of any one of aspects 14, 15, 17, and 18, further comprising: a rail extending along the outer surface, wherein the handle includes a projection extending from the first end of the body in a first direction and a second direction in that order, the first direction being away from the body and non-planar to the first end of the body, and the second direction being different from the first direction, and the projection engaging the rail to secure the handle to the outer surface.

Aspect 20. The wafer carrier of aspect 19, wherein the projection of the handle is moved to engage the rail in the same direction as the insertable member is inserted into the aperture.

Aspect 21. The wafer carrier of either one of aspects 19 and 20, further comprising: a first side, the outer surface defined by the first side, and the handle extends along the first side, and the engagement of the projection and the rail inhibiting movement of the handle away from or towards the first side.

Aspect 22. The wafer carrier of any one of aspects 19-21, further comprising: a slot defined by an inner surface of the rail, the projection extending into the slot.

Aspect 23. The wafer carrier of any one of claims 14-22, wherein the wafer carrier is one of a front opening unified pod and a front opening shipping box.

Having thus described several illustrative embodiments of the present disclosure, those of skill in the art will readily appreciate that yet other embodiments may be made and used within the scope of the claims hereto attached. Numerous advantages of the disclosure covered by this document have been set forth in the foregoing description. It will be understood, however, that this disclosure is, in many respect, only illustrative. Changes may be made in the details, particularly in matters of shape, size, and arrangement of parts without exceeding the scope of the disclosure. The disclosure's scope is, of course, defined in the language in which the appended claims are expressed.