PATENT DOCUMENT

Publication Number: US-10408722-B2
Application Number: US-201615280514-A
Country: US
Kind Code: B2

Title: Proof testing brittle components of electronic devices

Abstract:
Methods and a system for proof testing brittle components of electronic devices are disclosed. The method may include positioning the brittle component relative to a probe of a testing system, contacting the probe to a surface of the brittle component at a first location, and applying a first force at the first location using the probe to create a first localized tensile band below the surface of the brittle component. The method may also include contacting the probe to the surface of the brittle component at a second location, distinct from the first location, and applying a second force at the second location using the probe to create a second localized tensile band below the surface of the brittle component.

Claims:
What is claimed is: 
     
       1. A method for proof testing a brittle component for an electronic device, comprising:
 positioning a probe of a testing system relative to the brittle component, the brittle component being supported by a base support; 
 contacting the probe to a surface of the brittle component at a first location; 
 applying a first compressive force at the first location using the probe to create a first localized tensile band below the surface of the brittle component; 
 contacting the probe to the surface of the brittle component at a second location, distinct from the first location; and 
 applying a second compressive force at the second location using the probe to create a second localized tensile band below the surface of the brittle component. 
 
     
     
       2. The method of  claim 1 , further comprising:
 moving the probe from the first location on the surface of the brittle component to the second location; and 
 maintaining contact between the surface of the brittle component and the probe as the probe moves from the first location to the second location. 
 
     
     
       3. The method of  claim 1 , further comprising rejecting the brittle component in response to at least one of the first applied compressive force or the second applied compressive force propagating a surface defect through at least a portion of the brittle component. 
     
     
       4. The method of  claim 1 , wherein: applying the first compressive force at the first location comprises applying the first compressive force to the brittle component for a predetermined time; and
 the predetermined time is dependent upon at least one of: operational characteristics of the testing system; or material characteristics of the brittle component. 
 
     
     
       5. The method of  claim 1 , wherein applying the first compressive force at the first location comprises forming a first compressed region in the brittle component, the first compressed region aligned with the probe. 
     
     
       6. The method of  claim 5 , wherein applying the first compressive force at the first location further comprises forming tensile band substantially surrounding the compressed region. 
     
     
       7. The method of  claim 1 , wherein positioning the brittle component relative to the probe comprises securing the brittle component to a rigid base support. 
     
     
       8. The method of  claim 1 , wherein positioning the brittle component relative to the probe comprises preventing edges of the brittle component from bending when the first compressive force is applied and the second compressive force is applied. 
     
     
       9. A method for proof testing a brittle component for an electronic device, comprising:
 positioning the brittle component relative to a probe of a testing system, the probe including a rotatable contact portion configured to contact and roll over a surface of the brittle component and to apply a force to the brittle component while rolling; 
 contacting a surface of the brittle component at a first location with the probe; 
 moving the probe from the first location to a second location on the surface of the brittle component while maintaining contact between the rotatable contact portion of the probe and the surface; and 
 varying a force applied to the brittle component as the probe moves from the first location to the second location to create a localized tensile band below the surface of the brittle component. 
 
     
     
       10. The method of  claim 9 , wherein varying the force applied to the brittle component comprises forming a compressed region in the brittle component, and aligned with the probe. 
     
     
       11. The method of  claim 10 , wherein varying the force applied to the brittle component to create the localized tensile band comprises one of:
 forming the localized tensile band around the compressed region formed in the brittle component; or 
 forming the localized tensile band on opposite sides of the compressed region formed in the brittle component. 
 
     
     
       12. The method of  claim 9 , wherein varying the force applied to the brittle component comprises:
 applying a first force at the first location; and 
 applying a second force at the second location, the second force distinct from the first force. 
 
     
     
       13. The method of  claim 12 , wherein varying the force applied to the brittle component comprises one of:
 increasing the force applied to the brittle component as the probe moves from the first location to the second location; or 
 decreasing the force applied to the brittle component as the probe moves from the first location to the second location. 
 
     
     
       14. The method of  claim 9 , wherein varying the force applied to the brittle component comprises:
 applying a greater force at the first location than a force applied at the second location; wherein 
 the first location comprises a stronger portion of the brittle component than the second location. 
 
     
     
       15. A system for proof testing a brittle component, comprising:
 a rigid base support configured to receive the brittle component; 
 perimeter supports substantially surrounding the brittle component, the perimeter supports configured to apply a clamping force on the brittle component toward the rigid base support; 
 a probe positioned above the rigid base support, the probe including a rotatable contact portion configured to contact and roll over a surface of the brittle component and to apply a force to the brittle component while rolling; and 
 a gantry system coupled to the probe and configured to move the probe above the rigid base support. 
 
     
     
       16. The system of  claim 15 , wherein the rotatable contact portion of the probe comprises a substantially spherical contact portion configured to form a substantially circular contact area on the brittle component. 
     
     
       17. The system of  claim 16 , wherein the substantially spherical contact portion of the probe comprises a ball bearing. 
     
     
       18. The system of  claim 15 , wherein the rigid base support is configured to move the brittle component below the probe. 
     
     
       19. The system of  claim 15 , wherein the probe is configured to:
 form a compressed region within the brittle component, the compressed region aligned with the probe contacting the brittle component; and 
 form a localized tensile band within the brittle component, the localized tensile band positioned substantially adjacent the compressed region.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a nonprovisional patent application of and claims the benefit to U.S. Provisional Patent Application No. 62/234,931, filed Sep. 30, 2015 and titled “Proof Testing Brittle Components of Electronic Devices,” the disclosure of which is hereby incorporated herein by reference in its entirety. 
    
    
     FIELD 
     The disclosure relates generally to testing materials and more particularly to methods for proof testing brittle components of electronic devices and proof testing systems. 
     BACKGROUND 
     Current electronic devices continue to become more prevalent in day-to-day activities. For example, smart phones and tablet computers continue to grow in popularity and provide everyday personal and business functions to their users. These electronic devices typically include input components, such as buttons or screen displays, that may be utilized by a user to interact (e.g., input/output) with the electronic devices. These input components may be formed on and/or integral with the housing of the electronic device. 
     To maintain and/or to ensure functionality of the electronic device, input components and the housing of electronic devices may be formed from materials that may withstand conventional wear-and-tear on the electronic device. As an example, ceramic materials may be used to form the input components and/or the housing. Specific examples of the ceramic material include alumina (Al 2 O 3 ) (e.g., corundum), sapphire and zirconia. Because of the unique and beneficial chemical or physical characteristics (e.g., hardness, strength), ceramic materials have become a viable material to be used in current electronic devices. 
     To ensure all ceramic materials used to form components of the electronic device meet quality control standards and/or will function substantially similarly between each individual device, the ceramic materials may undergo conventional material testing processes. Such material testing processes may include a material bending test. During the bending test, a piece of ceramic material is bent or flexed to detect material faults and/or flaws that may be formed in the material. However, because the bending test applies a global stress to the ceramic material when flexing the material, the results of the test may be less than accurate. For example, the ceramic material may prematurely break in a portion of the material that includes no faults or material flaws, but includes reduced strength because of features (e.g., apertures, recess) formed therein. Additionally, the ceramic material may not break in a portion of the material that includes detrimental material fault or flaw because of the way in which the global stress is formed on the ceramic material and/or the location of the material flaw in respect to the bend in the ceramic material. Further, the bending test applies a global stress to the entire ceramic material and does not differentiate between portions of the ceramic material that may be more or less susceptible to damage when implemented within the electronic device. 
     Therefore, it is desirable to have a material testing process that can selectively and accurately proof test a ceramic material. 
     SUMMARY 
     A method for proof testing brittle components for an electronic device is disclosed. The method comprises positioning a probe of a testing system relative to the brittle component, contacting the probe to a surface of the brittle component at a first location, and applying a first force at the first location using the probe to create a first localized tensile band below the surface of the brittle component. The method can also comprise contacting the probe to the surface of the brittle component at a second location, distinct from the first location, and applying a second force at the second location using the probe to create a second localized tensile band below the surface of the brittle component. 
     A method for proof testing brittle components for an electronic device is disclosed. The method comprises positioning the brittle component relative to a probe of a testing system, contacting the probe to a surface of the brittle component at a first location, moving the probe from the first location to a second location on the surface of the brittle component, and varying a force applied to the brittle component as the probe moves from the first location to the second location to create a localized tensile band below the surface of the brittle component. 
     A system for proof testing a brittle component is disclosed. The system comprises a rigid base support configured to receive the brittle component, and perimeter supports substantially surrounding the brittle component. The perimeter supports are configured to apply a clamping force on the brittle component toward the base support. The system also comprises a probe positioned above the base support. The probe is configured to contact a surface of the brittle component and apply a force to the brittle component. Additionally, the system comprises a gantry system coupled to the probe and configured to move the probe above the base support. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The disclosure will be readily understood by the following detailed description in conjunction with the accompanying drawings, wherein like reference numerals designate like structural elements, and in which: 
         FIG. 1A  shows a testing system including a probe and a brittle component for an electronic device, according to embodiments. 
         FIG. 1B  shows a front view of the testing system and the brittle component of  FIG. 1A , according to embodiments. 
         FIG. 2A  shows a front view of a test probe of a testing system and a portion of a brittle component for an electronic device, according to embodiments. 
         FIG. 2B  shows a top view of a contact area formed on the brittle component by the test probe of  FIG. 2A , according to embodiments. 
         FIG. 3  shows a flow chart of an example process for proof testing brittle components for an electronic device, according to embodiments. 
         FIG. 4A  shows a testing system including a probe and a brittle component for an electronic device prior to the probe contacting the brittle component at a first location, according to embodiments. 
         FIG. 4B  shows a front view of the test probe contacting the brittle component of  FIG. 4A  at the first location, according to embodiments. 
         FIG. 4C  shows a front view of the test probe applying a first force to the brittle component of  FIG. 4A  at the first location, according to embodiments. 
         FIG. 4D  shows a front view of the test probe contacting the brittle component at a second location and applying a second force to the brittle component of  FIG. 4A , according to embodiments. 
         FIG. 4E  shows a front view of the test probe contacting the brittle component of  FIG. 4A  at a second location, according to additional embodiments. 
         FIG. 4F  shows a front view of the test probe applying a second force to the brittle component of  FIG. 4A  at the second location, according to additional embodiments. 
         FIG. 5  shows a front view of a test probe of a testing system and a portion of a brittle component for an electronic device, according to further embodiments. 
         FIG. 6A  shows a front view of a test probe of a testing system and a portion of a brittle component for an electronic device, according to another embodiment. 
         FIG. 6B  shows a side view of the test probe of the testing system and a portion of the brittle component for an electronic device of  FIG. 6A , according to another embodiment. 
         FIG. 6C  shows a top view of a contact area formed on the brittle component by the test probe of  FIG. 6A , according to embodiments. 
         FIG. 7  shows a flow chart of an example process for proof testing brittle components for an electronic device, according to additional embodiments. 
         FIG. 8A  shows a top view of a brittle component for an electronic device and a test probe contacting the brittle component, according to embodiments. 
         FIG. 8B  shows a top view of a brittle component for an electronic device and a test probe contacting the brittle component, according to additional embodiments. 
         FIG. 9  shows an electronic device utilizing a brittle component, according to embodiments. 
     
    
    
     DETAILED DESCRIPTION 
     Reference will now be made in detail to representative embodiments illustrated in the accompanying drawings. It should be understood that the following descriptions are not intended to limit the embodiments to one preferred embodiment. To the contrary, it is intended to cover alternatives, modifications, and equivalents as can be included within the spirit and scope of the described embodiments as defined by the appended claims. 
     The following disclosure relates generally to testing materials and more particularly to methods for proof testing brittle components of electronic devices and proof testing systems. 
     In a particular embodiment, the testing system is configured to selectively apply forces to a brittle component utilized in an electronic device to determine if the brittle component meets desired quality and/or strength standards. The forces selectively applied to the brittle component use a testing probe that is configured to apply the forces in various locations on the brittle component at various magnitudes. The locations which receive the force include unique characteristics, such as varied strengths or support within the electronic device and/or locations more susceptible to damage over the operational life of the electronic device, and therefore require material testing to ensure the component can be utilized within the electronic device without risk of premature failure (e.g., cracking). Additionally, these unique characteristics determine the magnitude of the force applied at these locations. Selectively applying distinct forces in predetermined locations of a brittle component of an electronic device ensures that the testing process used to determine if the brittle component can be utilized in the electronic device is accurate, precise and does not just uniformly stress the brittle component which includes unique portions, as discussed herein. 
     These and other embodiments are discussed below with reference to  FIGS. 1A-9 . However, those skilled in the art will readily appreciate that the detailed description given herein with respect to these Figures is for explanatory purposes only and should not be construed as limiting. 
       FIGS. 1A and 1B  show a material testing system, according to embodiments. Testing system  100  is configured to proof test brittle materials or components  102  (hereafter, “brittle component  102 ”) utilized by an electronic device (see,  FIG. 9 ). Specifically, and as discussed in detail below, a test probe  104  of testing system  100  is configured to apply forces to various, distinct locations on brittle component  102  in order to determine if brittle component  102  meets desired quality and/or strength standards for implementation within an electronic device. By selectively applying distinct forces in predetermined locations of brittle component  102 , testing system  100  and the testing process performed by testing system  100  can accurately and precisely determine if brittle component  102  meets quality and/or strength standards; especially in portions of brittle component  102  that include unique characteristics (e.g., portions having varied strengths, thickness or support within the electronic device, portions more susceptible to damage over the operational life of the electronic device and so on), as discussed herein. 
     Brittle component  102  is positioned below and/or adjacent probe  104  of testing system  100 . Brittle component  102  is formed from a variety of materials that have brittle characteristics or properties. In non-limiting examples, brittle component  102  is formed from glass or ceramics, including, for example, zirconia or sapphire. Additionally, and as discussed herein, brittle component  102  can be utilized within an electronic device, and specifically, brittle component  102  can be used to form transparent covers, buttons, caps, housings or enclosures and the like for an electronic device 
     As shown in  FIGS. 1A and 1B , probe  104  of testing system  100  is positioned above brittle component  102 . Probe  104  is coupled to a gantry system  106  configured to move probe  104  in various directions in order for probe to contact and/or apply a force to brittle component  102  in distinct locations when proof testing brittle component  102 . As shown in  FIGS. 1A and 1B , and discussed in detail with respect to  FIG. 2A , probe  104  includes a substantially spherical or curved contact portion (see,  FIG. 2A ;  230 ) that is configured to contact brittle component  102  during the proof testing process discussed herein. 
     Probe  104  is formed from various materials. In a non-limiting example, probe  104  is formed from a substantially rigid material. In non-limiting examples, the rigid material used to form probe  104  is substantially dense, substantially tough (e.g., strength, ductility and so on), and/or substantially hard. In non-limiting examples, probe  104  is formed from plastic, glass, metal, alloys and any other suitable material. In another non-limiting example, probe  104  is formed from a substantially compliant material. In non-limiting examples, the compliant material forming probe  104  is substantially elastic, substantially dense, substantially resilient, and/or has substantial compressive strength. With comparison to the rigid material, which may require probe  104  to be substantially hard, probe  104  formed from the complaint material may be substantially elastic and/or flexible. The elasticity and/or flexibility of the compliant material allows probe  104  to deform and increase the contact area formed between probe  104  and brittle component  102  during the proof testing process. In non-limiting examples, probe  104  is formed from rubber, neoprene, silicone, polyurethane, and/or any other elastomer or substantially compliant material. 
     Gantry system  106  of testing system  100  includes a variety of components configured to aid in the movement of probe  104  and application of the force applied to brittle component  102  by probe  104 . As shown in  FIG. 1A , gantry system  106  includes tracks  108 A,  108 B configured to move probe  104  in a first direction (D 1 ). Specifically, side tracks  108 A are positioned on opposite sides of probe  104 , and a cross-track  108 B is coupled to the bottom of side tracks  108 A and probe  104 . Cross-track  108 B is configured to slide and/or move within side tracks  108 A in the first direction (D 1 ). As a result, probe  104  coupled to cross-track  108 B via slider  110  of gantry system  106  is also configured to move in the first direction (D 1 ) with cross-track  108 B. 
     Slider  110  is coupled to cross-track  108 B of gantry system  106 , and is coupled to probe  104  via piston  112 . That is, a moveable piston of gantry system  106  is coupled to both slider  110  and probe  104 , such that the probe  104  is in turn coupled to slider  110  and configured to move with slider  110 . As shown in  FIG. 1A , slider  110  is configured to move or slide along cross-track  108 B in a second direction (D 2 ), perpendicular to the first direction (D 1 ). As a result of probe  104  being coupled to slider  110  via piston  112 , probe  104  is also configured to move in the second direction (D 2 ). 
     Piston  112  coupled to slider  110  and probe  104 , respectively, includes a moveable piston or hydraulic that is configured to move probe  104  of testing system  100  in a third direction (D 3 ). As shown in  FIGS. 1A and 1B , the third direction (D 3 ) is distinct from both the first direction (D 1 ) and the second direction (D 2 ). In a non-limiting example shown in  FIGS. 1A and 1B , the third direction (D 3 ) is toward and/or away from brittle component  102 . Additionally, because piston  112  is configured to move probe  104  in the third direction (D 3 ) toward and/or away from brittle component  102 , piston  112  is also configured to move probe  104  and apply the force(s) to brittle component  102  during the proof testing process discussed herein. 
     As a result of gantry system  106  and its various components (e.g., tracks  108 A,  108 B, slider  110 , piston  112 ), probe  104  of testing system  100  is configured to move in three directions when performing the proof testing process on brittle component  102 , as discussed herein. 
     As shown in  FIGS. 1A and 1B , testing system  100  also includes a rigid, base support  118  (hereafter, “base support  118 ”) receiving brittle component  102 . That is, brittle component  102  is positioned on base support  118  of testing system  100  and both brittle component  102  and base support  118  are positioned below probe  104  of testing system  100 . Base support  118  is formed from a substantially rigid material and/or includes substantially rigid properties. As a result of the rigid material and/or rigid properties, base support  118  is not deformed and/or deflected when probe  104  applies a force to brittle component  102  during the proof testing process discussed herein. In non-limiting examples, base support  118  is formed from plastic, glass, metal, alloys and any other suitable rigid material. 
     Additionally, although shown herein as being coupled to probe  104 , it is understood that gantry system  106  can also be coupled to base support  118  for moving brittle component  102 . That is, in distinct non-limiting examples, base support  118  and probe  104 , or just base support  118 , can be coupled to gantry system  106  and can be configured to move brittle component  102  in various directions with respect to probe  104  to allow probe  104  to contact brittle component  102  during the testing process. 
     Perimeter supports  120  are coupled to base support  118  and substantially surround brittle component  102 . As shown in  FIGS. 1A and 1B , two perimeter supports  120  are positioned on opposite sides of brittle component  102  and substantially cover ends or edges  122  of brittle component  102 . Perimeter supports  120  are configured to apply a clamping force on brittle component  102  toward base support  118 . The clamping force applied by perimeter supports  120  to brittle component  102 , and specifically edges  122  of brittle component  102 , prevents brittle component  102  from bending or deforming when a force is applied to brittle component  102  during the testing process discussed herein. Additionally, perimeter supports  120  prevent edges  122  of brittle component  102  from lifting off of base support  118  when a force is applied to brittle component  102  by probe  104  of testing system  100 . Although only two are shown, it is understood that testing system  100  can include more than two perimeter supports  120 . 
     As a result of the various processes performed on the ceramic material to form brittle component  102  and/or because of the physical characteristics (e.g., brittleness) of brittle component  102 , brittle component  102  can include surface defects on contact surface  124 . The surface defects formed in or on contact surface  124  of brittle component  102  may substantially and/or negatively impact (e.g., weaken) the physical and material characteristics of brittle component  102 . The surface defects formed in or on contact surface  124  are substantially small, and may not be visible or detected during a visual (e.g., naked-eye) inspection of brittle component  102 . As such, the defects can be considered micro-defects. Although undetectable, these surface defects over the operational life of the electronic device utilizing brittle component  102  can grow or propagate through brittle component  102 , and negatively impact the operation of brittle component  102  and/or an electronic device. 
     In non-limiting examples shown in  FIGS. 1A and 1B , surface defects may include one or more chips  126  or cracks  128  formed on or in contact surface  124  of brittle component  102 . Chip  126  and crack  128 , shown in phantom in  FIG. 1B , extend at least partially through brittle component  102 . Chip  126  and crack  128  may be formed due to normal wear and tear and handling of brittle component  102  prior to proof testing and can be implemented within an electronic device, as discussed herein. 
       FIGS. 2A and 2B  show a force being applied to brittle component  202  by probe  204  when proof testing brittle component  202 , as discussed herein. Specifically,  FIG. 2A  shows a front view of probe  204  applying a force to brittle component  202  and the various compressed and stressed regions formed therein as a result.  FIG. 2B  shows a top view of the compressed and stressed regions formed in the brittle component  202  when probe  204  applies a force to brittle component  202 . Probe  204  is omitted from  FIG. 2B  for clarity. 
     As shown in  FIG. 2A , substantially spherical or circular contact portion  230  of probe  204  contacts and/or applies a force to contact surface  224  of brittle component  202 . Spherical contact portion  230  of probe  204  is configured to form a substantially circular contact area on contact surface  224  of brittle component  202  when performing the proof testing process discussed herein. 
     As shown in  FIGS. 2A and 2B , when piston  212  of a gantry system (see, e.g., gantry system  106  of  FIG. 1A ) moves probe  204  in a third direction (D 3 ) (see,  FIG. 1A ) toward contact surface  224  and applies a force to brittle component  202 , portions of brittle component  202  formed below contact surface  224  and/or probe  204  are affected. In a non-limiting example, a compressed region (CR) is formed in a portion of brittle component  202  when probe  204  applies a force to brittle component  202 . As shown in  FIG. 2A , the compressed region (CR) is formed below contact surface  224 , and is substantially aligned with probe  204  contacting brittle component  202 . Additionally, in the non-limiting example, the compressed region (CR) is substantially aligned with the portion of substantially spherical or circular contact portion  230  of probe  204  contacting brittle component  202 . The compressed region (CR) is formed in brittle component  202  as a result of the force applied by probe  204  compressing the contacted portion of brittle component  202 . 
     In the non-limiting example shown in  FIGS. 2A and 2B , localized tensile band (TB) is also formed within a portion of brittle component  202  when probe  204  applies a force to brittle component  202 . Tensile band (TB) is formed below contact surface  224 , and is formed substantially adjacent probe  204  contacting brittle component  202 . As shown in  FIGS. 2A and 2B , tensile band (TB) is also positioned adjacent to and/or substantially surrounds compressed region (CR) formed in brittle component  202 . Tensile band (TB) is formed in brittle component  202  as a result of forming compressed region (CR) in brittle component  202  when the force is applied by probe  204 . 
     As shown in  FIGS. 2A and 2B , the tensile band (TB) formed in brittle component  202  is substantially larger in width than the compressed region (CR). Additionally, as shown in FIG.  2 A, the depth or magnitude of the tensile band (TB) decreases as the distance from the compressed region (CR) increases. Specifically, at the transition line between the compressed region (CR) and the tensile band (TB), the depth or magnitude of each of the compressed region (CR) and tensile band (TB) is substantially equal. However, as the distance within the tensile band (TB) increases from the compressed region (CR), the depth or magnitude of the tensile band decreases. The size, width, depth and/or magnitude of the compressed region (CR) and tensile band (TB) formed in brittle component  202  when probe  204  applies a force is dependent on, at least in part, the size of probe  204  and/or contact portion  230 , the shape of contact portion  230  of probe  204 , the material composition of brittle component  202 , the magnitude of the force applied by probe  204  and so on. 
       FIG. 3  depicts an example process for proof testing a component. Specifically,  FIG. 3  is a flowchart depicting one example process  300  for proof testing a brittle component for an electronic device. In some cases, the brittle component is formed from a ceramic material, as discussed herein respect to  FIGS. 1A and 1B  and can be utilized within an electronic device discussed below with respect to  FIG. 9 . 
     In process  302 , a brittle component is positioned relative to a probe of a testing system. The brittle component can take the form of a component utilized by an electronic device and can be formed from a brittle, ceramic material including, but not limited to, alumina, sapphire or zirconia. The brittle component can include surface defects (e.g., chips, cracks) formed on a surface and/or partially through the brittle component. These surface defects are typically small enough (e.g., micro-cracks) to go undetected when visually inspecting the brittle component. 
     Positioning the brittle component relative to the probe can also include securing the brittle component to a rigid base support. The rigid base support prevents the brittle component from deflecting or bending when the probe applies a force to the brittle component (e.g., process  306 , process  310 ), as discussed herein. Additionally, positioning the brittle component relative to the probe also includes preventing or restraining edges of the brittle component from bending when a force is applied to the brittle component by the probe. The edges can be restrained by perimeter supports surrounding the brittle component and coupled to the edges of the brittle component. The perimeter supports prevent or restrain the edges of the brittle component by providing a clamping force on the brittle component toward the rigid base support. 
     In process  304 , the probe of the testing system contacts the brittle component at a first location. Specifically, the probe is moved to contact a surface of the brittle component at a first location of the brittle component. The probe is moved to contact the brittle component at the first location by a gantry system. The first location of the brittle component which the probe contacts can be a random location on the brittle component or can be a predetermined location. Where the first location is predetermined, the first location can include a feature (e.g., aperture) formed in the brittle component, and/or can include a portion of the brittle component that is supported by internal components or portions of the electronic device. Additionally, the first location can also include a surface defect formed in the brittle component. 
     In process  306 , a first force is applied to the brittle component at the first location. The first force is applied to the brittle component using the probe of the testing system. Applying the first force at the first location of the brittle component can create a compressed region and a localized tensile band in the brittle component. The compressed region is formed in the brittle component below and/or aligned with the probe contacting the surface of the brittle component. The tensile band is created below the surface of and/or partially within the brittle component. The tensile band is also positioned adjacent and/or substantially surrounds the compressed region created in the brittle component. 
     Applying the first force in process  306  also includes applying the first force for a predetermined time to (potentially) propagate, grow and/or spread a surface defect formed in the brittle component. Specifically, the first force is applied to the first location of the brittle component for a predetermined time, such that if a surface defect exists in a portion of the brittle component that includes the compressed region and/or the tensile band, the surface defect would propagate through at least a portion of the brittle component. As a result of propagating the surface defect through at least a portion of the brittle component, the surface defect can now be seen in the brittle component. That is, the previously undetected (e.g., not visible) surface defect formed in the brittle component becomes visible subsequent to applying the first force for the predetermined time and propagating the surface defect through at least a portion of the brittle component. The predetermined time for applying the first force to the brittle component is dependent on, at least in part, operational characteristics of the testing system (e.g., size of test probe, size of contact area between the test probe and the brittle component, the magnitude of the force applied to the brittle component and so on) and/or material characteristics of the brittle component (e.g., material composition, features formed adjacent the first location, material thickness and so on). 
     In process  308 , the probe of the testing system contacts the brittle component at a second location, distinct from the first location in process  304 . Specifically, the probe is moved to contact the surface of the brittle component at a second location of the brittle component that is distinct from the first location. Similar to process  304 , the second location of the brittle component which the probe contacts can be a random location on the brittle component or can be a predetermined location. Where the second location is predetermined, the second location can include a feature (e.g., aperture) formed in the brittle component, and/or can include a portion of the brittle component that is supported by internal components or portions of the electronic device. Additionally, the second location can also include a surface defect formed in the brittle component. 
     Although not shown in  FIG. 3 , intermediate steps or processes can take place between applying the first force to the brittle component at the first location and contacting the brittle component at the second location. That is, the process can include moving the probe from the first location on the surface of the brittle component to the second location. As discussed herein, the probe is moved using the gantry system. The moving of the probe from the first location to the second location can include lifting the probe from the first location after applying the first force for the predetermined time, and moving the probe to above the second location without contacting the brittle component. Once positioned above the second location, the probe can contact the brittle component at the second location. 
     In an additional non-limiting example, while moving the probe from the first location to the second location, constant contact between the surface of the brittle component and the probe can be maintained. The contact can be maintained by implementing a roller feature, such as a ball bearing, on the contact portion of the probe, or simple moving or sliding the substantially spherical contact portion of the probe along the surface of the brittle component. As discussed herein in detail, maintaining constant contact between the brittle component and the probe while moving the probe from the first location to the second location can also allow the probe to apply a force, constant or variable, to the portions of the brittle component positioned between the first location and the second location. This can allow improved material testing and testing a larger area of the brittle component to determine if the brittle component is capable of being used within an electronic device, as discussed herein. 
     In process  310 , a second force is applied to the brittle component at the second location. The second force can be similar or different in magnitude than the first force applied to the brittle component at the first location in process  306 . The second force is applied to the brittle component using the probe of the testing system. Similar to the first force, applying the second force at the second location of the brittle material can create a compressed region and a localized tensile band in the brittle component. The compressed region is formed in the brittle component below and/or aligned with the probe contacting the surface of the brittle component. The tensile band is created below the surface of and/or partially within the brittle component. The tensile band is also positioned adjacent and/or substantially surrounds the compressed region created in the brittle component. 
     Applying the second force in process  310 , like applying the first force in process  306 , also includes applying the second force for a predetermined time to (potentially) propagate, grow and/or spread a surface defect formed in the brittle component. Specifically, the second force is applied to the second location of the brittle component for a predetermined time, such that if a surface defect exists in a portion of the brittle component that includes the compressed region and/or the tensile band, the surface defect would propagate through at least a portion of the brittle component. As a result of propagating the surface defect through at least a portion of the brittle component, the surface defect can now be seen in the brittle component. 
     In process  312 , the brittle component is rejected from use within an electronic device in response to a surface defect being propagated through at least a portion of the brittle component. Specifically, when the previously invisible or undetectable surface defect formed in the brittle component is propagated and/or becomes visible in response to applying the first force in process  306  and/or the second force in process  310 , the brittle component has failed the testing process. As such, the brittle component is discarded and/or not used within an electronic device because it does not meet the quality and/or strength standards for the electronic device, as discussed herein. 
       FIGS. 4A-4F  show brittle component  402  undergoing the process  300  for proof testing a brittle component as shown and discussed herein with respect to  FIG. 3 . Testing system  400  shown in  FIG. 4A  is substantially similar to testing system  100  shown and discussed herein with respect to  FIGS. 1A and 1B . Specifically, testing system  400  includes probe  404  positioned above brittle component  402  and configured to apply a force to contact surface  424  of brittle component  402  in various locations when performing the proof testing process. It is understood that similarly numbered and/or named components may function in a substantially similar fashion. Redundant explanation of these components has been omitted for clarity. 
     Additionally as shown in  FIGS. 4A-4F , brittle component  402  is substantially similar to brittle component  102 ,  202  shown and discussed herein with respect to  FIGS. 1A-2B . Specifically in  FIG. 1A , brittle component  402  is positioned relative to probe  404 , and secured to rigid base support  418  using perimeter supports  420  clamping edges  422 . Distinct from brittle components previously discussed, brittle component  402  includes features  432 , shown in phantom, formed in brittle component  402 . As shown in  FIG. 4A , features  432  can be formed and/or exposed on contact surface  424  of brittle component  402 , and can be formed at least partially through brittle component  402 . In a non-limiting example shown in  FIG. 4A , features can be formed completely through brittle component  402 . Features  432  are specific to the electronic device that utilizes brittle component  402 . In the non-limiting example of  FIG. 4A , feature  432  formed adjacent chip  426  of brittle component  402  is configured as a button aperture which can receive, housing and/or expose a button of the electronic device utilizing brittle component  402 . 
     As discussed in detail below, the proof testing process  300  performed on brittle component  402  can include applying multiple forces to distinct locations on brittle component  402  to ensure brittle component  402  does not include surface defects (e.g., chip  426 , crack  428 ) that will reduce the operational life of brittle component  402  and/or the electronic device. The distinct locations of brittle component  402  which receive the force applied by probe  404  include unique or distinct properties or characteristics when compared to other portions of brittle component  402 . In non-limiting examples, the various locations receiving the force applied by probe  404  during the proof testing process can include, but are not limited to, distinct material strength, distinct amounts of support provided to that portion of brittle component  402  by other internal components of the electronic device and/or predetermined locations of brittle component  402  that are more susceptible to damage over the operational life of the electronic device. In a non-limiting example, and as discussed herein in detail, a first location of brittle component  402  that may receive a first force applied by probe  404  includes a portion of brittle component adjacent chip  426  and feature  432 . In other non-limiting examples discussed below, a second location of brittle component  402  that receives the force applied by probe  404  can include a centralized portion of brittle component  402  formed between the features  432  and/or a portion of brittle component  402  positioned adjacent crack  428  and feature  432 . As discussed herein with respect to  FIG. 1A , surface defects (e.g., chip  426 , crack  428 ) are not visible or detectable when performing a visual inspection of brittle component  402 . 
     Additionally, and as discussed herein, the force applied to each location by probe  404  can be distinct. That is, a force applied to brittle component  402  at a first location can be distinct from the force applied to a distinct location on brittle component  402 . The magnitude of the force applied to each location by probe  404  is dependent on, at least in part, the unique or distinct properties or characteristics of each location of brittle component  402 . Continuing the non-limiting examples above, the first location for receiving a force applied by probe  404  positioned adjacent chip  426  and feature  432  can include a greater amount of support from additional components of the electronic device than the second location of brittle component  402  positioned adjacent crack  428  and feature  432 . Additionally in the non-limiting example, first location on the brittle component  402  can include a stronger portion of brittle component  402  than the second location of the brittle component  402 . The first location receiving the force from probe  404  is stronger because feature  432  is substantially circular and formed through only a small portion of brittle component  402  in the first location, and the feature  432  included in the second location is substantially elongated and formed through a larger portion of brittle component  402 . As a result, the first force applied to the first location on brittle component  402  can be greater than the second force applied at the second location to ensure each location is accurately stressed and meets the quality and strength standard for implementation within the electronic device. Alternatively, the first force can be smaller than the second force to ensure the second force can withstand greater stress and/or strain without becoming damaged. 
     The process performed on brittle component  402  as shown and discussed herein with respect to  FIG. 4A , correspond to operation  302  of the process  300  shown in  FIG. 3 . 
       FIGS. 4B and 4C  show cross-sectional views of brittle component  402  taken along line  4 B- 4 B of  FIG. 4A . Specifically,  FIG. 4B  shows a cross-sectional view of a first location of brittle component  402  after probe  404  contacts brittle component  402  and probe  404  and/or piston  412  initially apply a first force to brittle component  402 . Additionally,  FIG. 4C  shows a cross-sectional view of a first location of brittle component  402  after probe  404  and/or piston  412  apply a first force to brittle component  402  for a predetermined time. The predetermined time, as discussed above, is an amount of time that would result in the (potentially) propagation, growth and/or spreading of a surface defect (e.g., chip  426 ) formed in brittle component  402 . 
     As shown in  FIGS. 4B and 4C , the first location of brittle component  402  that a first force is applied includes chip  426  and feature  432 , shown in phantom. Chip  426  formed partially through brittle component  402  is at least partially positioned within the tensile band (TB) formed in brittle component  402  when probe  404  applies a force to brittle component  402 . That is, and as shown in  FIGS. 4B and 4C , the tensile band (TB) formed or created in brittle component  402  subsequent to applying the first force to brittle component  402  using probe  404  overlaps and/or extends into chip  426  formed in brittle component  402  prior to performing the proof testing process. As a result of applying the first force in the first location for the predetermined time, as shown in  FIGS. 4B and 4C , chip  426  can propagate and/or grow within brittle component  402 . Comparing  FIGS. 4B and 4C , the initial thickness (CO of chip  426  formed in brittle component  402  ( FIG. 4B ) grows and/or propagates through brittle component  402  after the force is applied for the predetermined time, such that the final thickness (C 2 ) ( FIG. 4C ) of chip  426  is greater than the initial thickness (CO of chip  426 . Propagation of chip  426  can also result in a crack  428 , shown in phantom, being formed in brittle component  402 . The propagation of chip  426  results in chip  426  becoming visible upon inspection after performing the proof testing process, and ultimately can lead to the discarding of brittle component  402  prior to being utilized within an electronic device, as discussed herein. 
     The processes performed on brittle component  402  as shown and discussed herein with respect to  FIGS. 4B and 4C , correspond to operations  304  and  306  of the process  300  shown in  FIG. 3 . 
       FIG. 4D  shows a cross-sectional view of brittle component  402  taken along line  4 D- 4 D in  FIG. 4A .  FIG. 4D  shows a distinct, second location of brittle component  402  after probe  404  contacts brittle component  402  and probe  404  and/or piston  412  apply a second force to contact surface  424  of brittle component  402  for a predetermined time. In a non-limiting example, after probe  404  contacts and applies the first force to brittle component  402  at the first location, probe  404  is lifted from brittle component  402  and/or no longer contacts brittle component  402 . Probe  404  is then moved to and positioned above the second location of brittle component  402  and subsequently moved toward brittle component  402  by piston  412  to apply the second force in the second location of brittle component  402 . As shown in  FIG. 4D , brittle component  402  does not include preexisting surface defects formed in the second location of brittle component  402 . As a result, the second portion of brittle component  402  shown in  FIG. 4D  is unaffected by the second force applied by probe  404 , and as discussed herein, meets quality and/or strength standards for implementation within an electronic device. 
     Alternatively,  FIGS. 4E and 4F  show cross-sectional views of brittle component  402  taken along line  4 E- 4 E of  FIG. 4A . Specifically,  FIG. 4E  shows a cross-sectional view of another distinct (e.g., second) location of brittle component  402  after probe  404  contacts brittle component  402  and probe  404  and/or piston  412  initially apply a distinct or second force to brittle component  402 . Additionally,  FIG. 4F  shows a cross-sectional view of the distinct location of brittle component  402  after probe  404  and/or piston  412  apply the second force to brittle component  402  for a predetermined time. 
     Similar to  FIGS. 4B and 4C , the second location of brittle component  402  that a second force is applied includes crack  428  and feature  432 , shown in phantom. As shown in  FIGS. 4E and 4F , crack  428  formed partially through brittle component  402  is at least partially positioned within the tensile band (TB) formed in brittle component  402  when probe  404  applies the second force to brittle component  402 . As a result of applying the second force in the second location for the predetermined time, as shown in  FIGS. 4E and 4F , crack  428  propagates and/or grows within brittle component  402 . Comparing  FIGS. 4E and 4F , the initial length (L 1 ) of crack  428  formed in brittle component  402  ( FIG. 4E ) grows and/or propagates through brittle component  402  after the second force is applied for the predetermined time, such that the final length (L 2 ) ( FIG. 4C ) of crack  428  is greater than the initial length (L 1 ) for crack  428 . 
     The propagation of chip  426  and/or crack  428  results in chip  426  and/or crack  428  becoming visible upon inspection after performing the proof testing process. Once chip  426  and/or crack  428  of brittle component  402  become visible, brittle component  402  may not meet a quality (e.g., aesthetic) standard by containing visible surface defects, and therefore is discarded and/or not implemented within an electronic device. Additionally and/or in conjunction within the surface defects becoming visible, the propagation of chip  426  and/or crack  428  within brittle component  402  substantially alters the physical and/or material characteristics (e.g., strength) of brittle component  402 . Where the propagation of chip  426  and/or crack  428  within brittle component  402  negatively impacts (e.g., weakens) the physical and/or material characteristics of brittle component  402 , the brittle component  402  may not meet material standards (e.g., strength) for implementation with the electronic device. As a result, brittle component  402  is discarded. 
     The processes performed on brittle component  402  as shown and discussed herein with respect to  FIGS. 4D-4F , correspond to operations  308 ,  310  and  312  of the process  300  shown in  FIG. 3 . 
     Turning to  FIG. 5 , probe  504  for testing system  500  is shown in another non-limiting example. Probe  504  is coupled to piston  512  and includes substantially circular and/or spherical contact portion  530  configured to form a substantially circular contact area on brittle component  502 , as similarly discussed herein with respect to  FIG. 2A . However, distinct from  FIG. 2A , probe  504  includes additional components in a distinct configuration. Specifically as shown in  FIG. 5 , probe  504  includes a ball bearing  534  positioned within and/or partially exposed from probe  504 . Ball bearing  534  positioned within a probe  504  includes a portion that is exposed from probe  504 , and is configured to contact brittle component  502  when performing a proof testing process as discussed herein. Additionally, ball bearing  534  is configured to rotate and/or move within probe  504 . As discussed herein, ball bearing  534  ability to rotate within probe  504  allows probe  504 , and specifically circular contact portion  530  formed on ball bearing  534 , to both contact brittle component  502  to apply a force when proof testing brittle component  502  and also roll along brittle component  502  (e.g., not be lifted) when moving from the first location and the second location on brittle component  502 . This allows probe  504  the ability to proof test the brittle component  502  at both the first and second location, as well as, the portions of brittle component  502  positioned between the first and second location that probe rolls over, as discussed herein. 
       FIGS. 6A-6C  shows another non-limiting example of probe  604  of testing system  600 , probe  604  contacting brittle component  602 . Probe  604  is omitted from  FIG. 6C  for clarity. In the non-limiting example, probe  604  includes a rotatable cylinder  636  configured to form a substantially linear contact area on brittle component  602 . As shown in  FIGS. 6A and 6B , rotatable cylinder  636  is coupled to piston  612  via bracket  638 . Rotatable cylinder  636  is coupled to bracket  638  using any conventional coupling components and/or techniques that allows rotatable cylinder  636  to rotate as probe  604  moves over brittle component  602 , as discussed herein. As similarly discussed herein, piston  612 , in combination with a gantry system (see,  FIG. 1A ), is configured to move rotatable cylinder  636  in a first direction (D 1 ), a second direction (D 2 ), and a third direction (D 3 ) (see,  FIGS. 1A and 1B ) to perform the proof testing process. Additionally in a non-limiting example, piston  612  is also configured to rotate rotatable cylinder  636 . 
     As shown in  FIG. 6B , rotatable cylinder  636  forming probe  604  includes substantially spherical or circular contact portion  630 . Substantially spherical or circular contact portion  630  of rotatable cylinder  636  contacts contact surface  624  when probe  604  applies a force to brittle component  602  during the proof testing process discussed herein. Additionally, because of the elongated shape of rotatable cylinder  636 , the contact area formed between rotatable cylinder  636  and brittle component  602  is also substantially elongated and linear. 
     As previously discussed herein with respect to  FIGS. 2A and 2B , when probe  604  contacts brittle component  602  and applies a force during the proof testing process, portions of brittle component  602  formed below contact surface  624  and/or probe  604  are affected. In a non-limiting example shown in  FIGS. 6A-6C , a compressed region (CR) is formed in a portion of brittle component  602  when probe  604  applies a force to brittle component  602 . As shown in  FIGS. 6A and 6B , the compressed region (CR) is formed below contact surface  624 , and is substantially aligned with probe  604  contacting brittle component  602 . Additionally, in the non-limiting example shown in  FIGS. 6A and 6B , because rotatable cylinder  634  forming probe  604  has a greater length (see,  FIG. 6A ) than width (see,  FIG. 6B ), the compressed region (CR) also has a greater length than width. 
     In the non-limiting example shown in  FIGS. 6A-6C , localized tensile band (TB) is also formed within a portion of brittle component  602  when probe  604  applies a force to brittle component  602 . The tensile band (TB) is formed below contact surface  624 , and is formed substantially adjacent probe  604  contacting brittle component  602 . As shown in  FIGS. 6A-6C , the tensile band (TB) is also positioned adjacent to and/or substantially surrounds compressed region (CR) formed in brittle component  602 . The tensile band (TB) is formed in brittle component  602  as a result of forming compressed region (CR) in brittle component  602  when the force is applied by probe  604 . 
     As shown in  FIGS. 6A-6C , the tensile band (TB) formed in brittle component  602  is substantially larger than the compressed region (CR). Specifically, the portions of tensile band (TB) formed on opposite sides of the compressed region (CR), and adjacent substantially circular contact portion  630  are substantially larger than the compressed region (CR). Additionally, the portions of tensile band (TB) formed on opposite sides of the compressed region (CR), and adjacent substantially circular contact portion  630  are substantially larger than the remaining portions of the tensile band (TB) positioned adjacent bracket  638  and/or the ends of rotatable cylinder  636 . The tensile band (TB) is smaller on the portions adjacent bracket  638  and/or the ends of rotatable cylinder  636  as a result of rotatable cylinder  636  having substantially flat or linear ends that are formed perpendicular to contact surface  624  of brittle component  602 . 
     Additionally, as shown in  FIGS. 6A and 6B , the depth or magnitude of the tensile band (TB) decreases as the distance from the compressed region (CR) increases. Specifically, at the transition line between the compressed region (CR) and the tensile band (TB), the depth or magnitude of each of the compressed region (CR) and tensile band (TB) is substantially equal. However, as the distance within the tensile band (TB) increases from the compressed region (CR), the depth or magnitude of the tensile band decreases. As discussed herein, the size, width, depth and/or magnitude of the compressed region (CR) and tensile band (TB) formed in brittle component  602  when probe  604  applies a force is dependent on, at least in part, the size of probe  604  and/or contact portion  630 , the shape of contact portion  630  of probe  604 , the material composition of brittle component  602 , the magnitude of the force applied by probe  604  and so on. 
       FIG. 7  depicts an example process for proof testing a component. Specifically,  FIG. 7  is a flowchart depicting one example process  700  for proof testing a brittle component for an electronic device. In some cases, the brittle component is formed from a ceramic material, as discussed herein respect to  FIGS. 1A and 1B  and can be utilized within an electronic device discussed below with respect to  FIG. 9 . 
     In process  702 , a brittle component utilized by an electronic device is positioned relative to a probe of a testing system. The brittle component can include surface defects (e.g., chips, cracks) that are undetected and/or invisible when performing a visual inspection of the brittle component. The surface defects are formed on a surface and/or partially through the brittle component. The brittle component can be formed from a brittle ceramic material including, but not limited to, alumina, sapphire or zirconia. 
     Positioning the brittle component relative to the probe can also include securing the brittle component to a rigid base support and/or preventing or restraining edges of the brittle component from bending when a force is applied to the brittle component by the probe, as similarly discussed herein with respect to process  302  of  FIG. 3 . Redundant explanation of these components and/or process(es) has been omitted for clarity. 
     In process  704 , the probe of the testing system contacts the brittle component at a first location. Specifically, the probe is moved to contact a surface of the brittle component at a first location of the brittle component. The probe is moved to contact the brittle component at the first location by a gantry system. The first location of the brittle component which the probe contacts can be a random location on the brittle component or can be a predetermined location. Where the first location is predetermined, the first location can include a feature (e.g., aperture) formed in the brittle component, and/or can include a portion of the brittle component that is supported by internal components or portions of the electronic device. Additionally, the first location can also include a surface defect formed in the brittle component. 
     In process  706 , the probe is moved from the first location on the surface of the brittle component to a second location on the brittle component, distinct from the first location. Specifically, the probe is moved from the first location to the second location, and remains in constant contact with the surface of the brittle component. The contact can be maintained as a result of the probe being formed from a substantially circular and rotatable cylinder or drum. The substantially circular and rotatable cylinder can roll along the surface of the brittle component from the first location to the second location. As discussed herein, the probe is moved using the gantry system. 
     In process  708 , a force is applied to the brittle component as the probe moves over and maintains contact with the surface of the brittle component. Specifically, a varied force is applied to the brittle component as the probe moves from the first location to the second location. The first force is applied to the brittle component using the probe of the testing system. Applying the varied force to the brittle component also includes forming a compressed region and creating a localized tensile band in the brittle component. The compressed region is formed in the brittle component below and/or aligned with the probe contacting the surface of the brittle component. The tensile band is created below the surface of and/or partially within the brittle component. The tensile band is also positioned adjacent and/or substantially surrounds the compressed region created in the brittle component. Where the probe is configured as a substantially circular and rotatable cylinder, at least a portion of the localized tensile band is created and/or formed within the brittle component on opposite sides of the compressed region formed therein. 
     Applying the varied force in process  708  also includes applying a first force at the first location and applying a second force at the second location. The second force applied at the second location on the brittle component is either substantially similar or different than the first force applied to the first location. Varying the force applied to the brittle component can also include increasing or decreasing the force applied to the brittle component as the probe moves from the first location on the brittle component to the second component. Additionally, varying the force applied to the brittle component can include applying a greater force at the first location than a force applied at the second location. The magnitude of the varying force applied to the brittle component can be dependent upon the physical and/or material characteristics of the brittle component. Specifically, the physical and/or material characteristics of the brittle component in the first and second location determines whether or not the first location receives a greater force than the second location, and how the force varies as the probe is moved from the first location to the second location. The physical and/or material characteristics can include the thickness of the brittle component, features formed in the brittle component, which affect the strength of the brittle component, and/or the amount of support provided to the brittle component by internal components or portions of the electronic device. In a non-limiting example where the first location on the brittle component includes a stronger portion of the brittle component and/or is provided more support from other internal components of the electronic device, the force applied at the first location is greater than the force applied at the second location. 
     In process  710 , the brittle component is rejected from use within an electronic device in response to a surface defect being propagated through at least a portion of the brittle component. Specifically, when the previously invisible or undetectable surface defect formed in the brittle component is propagated and/or becomes visible in response to applying the varied force and/or the first and second forces in process  708 , the brittle component has failed the testing process. As such, the brittle component is discarded and/or not used within an electronic device because it does not meet the quality and/or strength standards for the electronic device, as discussed herein. 
       FIGS. 8A and 8B  show top views of brittle component  802  and probe  804  or rotatable cylinder  836  performing a proof testing process  700  on brittle component  802  as similarly discussed herein with respect to  FIG. 7 . Probe  804  shown in  FIG. 8A  corresponds to probe  504  shown in  FIG. 5  that includes ball bearing  534 , and is configured to roll or move over contract surface  824  of brittle component  802  when performing the proof testing process  700 . Additionally,  FIG. 8B  shows probe configured as rotatable cylinder  836 , as similarly discussed herein with respect to  FIGS. 6A-6C . 
     Brittle component  802  shown in  FIGS. 8A and 8B  include a first location  840  and a second location on brittle component  802 . As similarly discussed above with respect to  FIGS. 4A-4F , first location  840  and second location  842  include unique or distinct properties or characteristics which affect and/or influence the magnitude of the force applied to each location of brittle component  802 . Continuing the example discussed above with respect to  FIGS. 4A-4F , first location  840  can include a greater amount of support from additional components of the electronic device than second location  842  of brittle component  802 , and first location  840  on the brittle component  802  can include a stronger portion of brittle component  802  than second location  842  of the brittle component  802 . As such, the first force applied at first location  840  by probe  804 /rotatable cylinder  836  is distinct (e.g., smaller, greater) than the second force applied at the second location  842  on brittle component  802 . 
     Distinct from the example proof testing process  300  discussed above with respect to  FIGS. 3-4F , probe  804  and rotatable cylinder  836  may not be lifted away from contact surface  824  when moving from first location  840  to second location  842 . Specifically, probe  804  including a ball bearing (see,  FIG. 5 ) and rotatable cylinder  836  (see,  FIGS. 6A-6C ) are configured to roll or move along contact surface  824 . As a result, probe  804  and rotatable cylinder  836  maintain constant contact with contact surface  824  of brittle component  802  when moving or rolling from first location  840  to second location  842 . In an example shown in  FIGS. 8A and 8B , probe  804  and/or rotatable cylinder  836  can move from first location  840  to second location  842  in a direction (D). Although only a single direction (D) is shown in  FIGS. 8A and 8B , it is understood that probe  804  and/or rotatable cylinder  836  can move in various directions when moving from first location  840  to second location  842  while maintaining contact with contact surface  824  (see,  FIG. 1A ). Allowing probe  804  and/or rotatable cylinder  836  to maintain contact with brittle component  802  as they move from first location  840  to second location  842  provides more areas and/or locations of brittle component  802  to be proof tested, which ultimately increases the accuracy and reliability of the proof test performed on brittle component  802 . 
     While maintaining contact with contact surface  824  when moving from first location  840  to second location  842 , probe  804 /rotatable cylinder  836  can vary a force applied to brittle component  804  while probe  804 /rotatable cylinder  836  are in motion. That is, probe  804 /rotatable cylinder  836  can apply a varied force to the portions of brittle component  802  positioned between first location  840  and second location  842  as probe  804 /rotatable cylinder  836  move from first location  840  to second location  842 . The varied force applied to brittle component  802  can vary based on location or position of probe  804 /rotatable cylinder  836  on brittle component  802  and/or the first force and second force applied to first location  840  and second location  842  respectively. In a non-limiting example where the first force applied to first location  840  is greater than the second force applied to the second location  842 , probe  804 /rotatable cylinder  836  can apply a decreasingly varied force as probe  804 /rotatable cylinder  836  move from first location  840  to second location  842 . In another non-limiting example where the first force applied to first location  840  is less than the second force applied to the second location  842 , probe  804 /rotatable cylinder  836  can apply an increasingly varied force as probe  804 /rotatable cylinder  836  move from first location  840  to second location  842 . In a further non-limiting example, the varied force can increase than decrease as probe  804 /rotatable cylinder  836  move from first location  840  to second location  842 . 
     As similarly discussed herein with respect to process  300  and  FIGS. 4B-4F , moving probe  804 /rotatable cylinder  836  over and maintaining contact with contact surface  824  while applying a varied force to brittle component  802  can result in the propagation of surface defects (e.g., crack, chips) formed in brittle component  802 . Where the surface defects propagate and become visible and/or impact the physical properties or characteristics of brittle component  802 , brittle component  802  can be rejected from implementation within an electronic device and is discarded. 
     The processes performed on brittle component  802  as shown and discussed herein with respect to  FIGS. 8A and 8B , correspond to operations  702 ,  704 ,  706 ,  708  and  710  of the process  700  shown in  FIG. 7 . 
       FIG. 9  shows an electronic device  900  that utilizes a brittle component discussed herein with respect to  FIGS. 1A-8B . Specifically, electronic device  900  includes various brittle components that are formed from the ceramic materials that undergo the proof testing process using the testing system discussed herein to ensure each brittle component of electronic device  900  meets a quality and/or strength standard. By meeting the quality and/or strength standard for electronic device  900 , the brittle component of electronic device  900  formed from the ceramic material includes desired functional, operational and/or physical characteristics and properties. As shown in  FIG. 9 , electronic device  900  is implemented as a mobile phone. Other embodiments can implement electronic device  900  differently, such as, for example, as a laptop or desktop computer, a tablet computing device, a gaming device, a display, a digital music player, a wearable computing device or display, a health monitoring device, and so on. 
     Electronic device  900  includes a housing  902  at least partially surrounding a display module, a cover  904  substantially covering the display module and one or more buttons or input devices  906 . Housing  902  can form an outer surface or partial outer surface and protective case for the internal components of the electronic device  900  and at least partially surrounds the display module positioned within an internal cavity formed by housing  902 . Housing  902  can be formed of one or more components operably connected together, such as a front piece and a back piece (not shown). Alternatively, housing  902  can be formed of a single piece operably connected to the display module. Housing  902  is formed from the ceramic material discussed herein, and as a result, undergoes the proof testing process using the testing system prior to being implemented in and/or forming a portion of electronic device  900 . 
     The display module is substantially surrounded by housing  902  and/or is positioned within an internal cavity formed by housing  902 , such that the display module is substantially protected on almost all sides by housing  902 . Cover  904  also protects the display module of electronic device  900 . Specifically, cover  904  is formed integral with and/or is coupled to housing  902  to substantially cover and protect the display module. Cover  904  covers at least a portion of the front surface of electronic device  900 . When a user interacts with the display module of electronic device  900 , the user touches or contacts cover  904 . Similar to housing  902 , cover  904  of electronic device  900  can be a brittle component and is therefore formed from the ceramic material discussed herein. The ceramic material forming cover  904  can undergo the proof testing process performed by the testing system discussed herein with respect to  FIGS. 1A-8B . By performing the proof testing process on the ceramic material forming cover  904 , it is ensured that the ceramic material forming cover  904  meets the quality and/or strength standard required for implementation within electronic device  900  and/or cover  904  and includes desired functional, operational and/or physical characteristics and properties. 
     Button  906  can take the form of a home button, which may be a mechanical button, a soft button (e.g., a button that does not physically move but still accepts inputs), an icon or image on a display, and so on. Further, in some embodiments, button  906  can be integrated as part of cover  904  of the electronic device  900 . Button  906 , like housing  902  and cover  904 , is a brittle component of electronic device  900  and, as a result, is formed from the ceramic material that undergoes the proof testing process as discussed herein. 
     The foregoing description, for purposes of explanation, used specific nomenclature to provide a thorough understanding of the described embodiments. However, it will be apparent to one skilled in the art that the specific details are not required in order to practice the described embodiments. Thus, the foregoing descriptions of the specific embodiments described herein are presented for purposes of illustration and description. They are not targeted to be exhaustive or to limit the embodiments to the precise forms disclosed. It will be apparent to one of ordinary skill in the art that many modifications and variations are possible in view of the above teachings.

Metadata:
Filing Date: 20160929
Publication Date: 20190910
Grant Date: 20190910
Priority Date: 20150930
Inventors: BARTLOW, CHRISTOPHER C.
MEMERING, DALE N.
Assignee: APPLE INC
CPC Classifications: [{"code": "G01M99/00", "inventive": true, "first": false, "tree": "[]"}, {"code": "G01N3/20", "inventive": true, "first": true, "tree": "[]"}, {"code": "G01N3/20", "inventive": true, "first": true, "tree": "[]"}, {"code": "G01N3/20", "inventive": true, "first": true, "tree": "[]"}, {"code": "G01M99/00", "inventive": true, "first": false, "tree": "[]"}]
Family ID: 58408825