Apparatus and method for characterization and optional sorting and assembly of microelectronic components according to warpage
This application relates to a method of processing microelectronic components comprising measuring parameter values of at least one of a nature and a degree of warpage of singulated microelectronic components in an unconstrained state and sorting the singulated microelectronic components responsive to the measured parameter values of at least one of the nature and degree of warpage. The sorted dice may be used in assemblies to minimize bond line height variances and resulting open circuits between components. Systems for implementing the methods are also disclosed.
1 . A microelectronic component processing apparatus, comprising:
a platform for supporting at least one singulated microelectronic component in an unconstrained state;
a device for measuring at least one of a nature and a degree of warpage of the at least one singulated microelectronic component, the device configured to direct energy in at least one scanning path across a surface of the at least one singulated microelectronic component supported on the platform;
a controller comprising at least one microprocessor configured for initiating measurements of the at least one singulated microelectronic component on the platform by the device and receiving signals from the device including parameter values of data representative of the at least one of the nature and the degree of warpage of the at least one singulated microelectronic component;
memory operably coupled to the controller for receiving and storing the data;
a transfer assembly operably coupled to the controller for retrieving singulated microelectronic components from the platform and transferring each singulated microelectronic component to one of a number of bins assigned by the controller based on the parameter values of data associated with each singulated microelectronic component; and
additional memory operably coupled to the controller and storing sets of predetermined parameter values of nature and degree of warpage, and the controller is further configured to sort the singulated microelectronic components for binning responsive to comparisons of parameter values of the data to predetermined parameter values of the sets stored in the additional memory.
2 . The apparatus of claim 1 , further comprising a pick assembly operably coupled to the controller for retrieving a number of singulated microelectronic components from a carrier structure and transferring the singulated microelectronic components to the platform.
3 . The apparatus of claim 2 , wherein the carrier structure comprises a mounting film supported on a film frame and supporting the number of singulated microelectronic components.
4 . The apparatus of claim 2 , wherein the carrier structure comprises a rigid carrier substrate supporting the number of singulated microelectronic components.
5 . The apparatus of claim 1 , wherein the sets of parameter values stored in the additional memory reside in one or more lookup tables.
6 . The apparatus of claim 1 , further comprising a component storage platform, comprising a number of pockets, each pocket configured for receiving a singulated microelectronic component, each pocket associated upon insertion therein of a singulated microelectronic component with the particular bin thereof, and further comprising storage memory for storing bin and associated pocket location of the inserted singulated microelectronic component.
7 . The apparatus of claim 6 , wherein the component storage platform further comprises one of a tape of a tape and reel apparatus, or a chip tray.
8 . The apparatus of claim 6 , further comprising a device for retrieving singulated microelectronic components from the component storage platform and transferring each respective measured singulated microelectronic component to an unsingulated microelectronic component location on a base substrate if the bin of the respective retrieved singulated microelectronic component stored in storage memory indicates acceptability in terms of the nature and the degree of warpage for placement on the unsingulated microelectronic component location.
9 . The apparatus of claim 8 , wherein the base substrate is a semiconductor wafer.
10 . The apparatus of claim 8 , wherein the device for retrieving singulated microelectronic components from the component storage platform and transferring each respective singulated microelectronic component to an unsingulated microelectronic component location on a base substrate is further operably coupled to memory for storing a location and bin of each singulated microelectronic component transferred to the base substrate.
11 . The apparatus of claim 8 , wherein the device for retrieving singulated microelectronic components from the component storage platform and transferring each respective singulated microelectronic component to an unsingulated microelectronic component location on a base substrate is further configured to, upon retrieving a respective singulated microelectronic component from the component storage platform, comparing a bin of the respective singulated microelectronic component stored in storage memory to locations and associated bins of singulated microelectronic components stored in storage memory of an existing layer of singulated microelectronic components of a microelectronic component stack on the base substrate and identifying a singulated microelectronic component of available microelectronic components of the existing layer for transfer thereto of the respective singulated microelectronic component thereon to minimize at least one of warpage mismatch or bond line height variance.
12 . The apparatus of claim 8 , wherein the device for retrieving singulated microelectronic components from the component storage platform and transferring each respective singulated microelectronic component to an unsingulated microelectronic component location on a base substrate is further configured to, upon retrieving a respective singulated microelectronic component from the component storage platform for transfer to a next to uppermost microelectronic component location of a microelectronic component stack, determining if the bin of the respective retrieved singulated microelectronic component indicates acceptability in terms of the nature and the degree of warpage for placement within the microelectronic component stack under a substantially planar uppermost microelectronic component.
13 . A method of processing microelectronic components, comprising:
measuring parameter values of at least one of a nature and a first degree of warpage of singulated microelectronic components in an unconstrained state at a first temperature;
predicting second parameter values including a second degree of warpage of the singulated microelectronic components expected at a second temperature; and
sorting the singulated microelectronic components responsive to the measured parameter values of at least one of the nature and the first degree of warpage at the first temperature and the second parameter values including the second degree of warpage expected at the second temperature.
14 . The method of claim 13 , further comprising characterizing the singulated microelectronic components by comparing the measured parameter values of at least one of the nature and the first degree of warpage thereof to predetermined parameter values relating to the at least one of the nature and the first degree of warpage.
15 . The method of claim 14 , wherein the predetermined parameter values each comprise a range of values of at least one of the nature and the first degree of warpage.
16 . The method of claim 14 , further comprising characterizing the singulated microelectronic components by comparing the measured parameter values of the nature and the first degree of warpage thereof to predetermined parameter values comprising sets of values relating to the nature and the first degree of warpage.
17 . The method of claim 13 , wherein if one or more measured parameter values or expected second parameter values of a singulated microelectronic component fall outside of predetermined limits, the singulated microelectronic component is rejected for use.
18 . The method of claim 13 , further comprising using predetermined parameter values stored in one or more lookup tables for sorting the singulated microelectronic components.
19 . The method of claim 13 , further comprising transferring the singulated microelectronic components to a storage platform, associating the sort of each singulated microelectronic component with a location of the storage platform, and storing the associated sort in computer memory.
20 . The method of claim 19 , wherein the locations of the storage platform are pockets in either a tape of a tape and reel apparatus, or pockets in a chip tray, and transferring the singulated microelectronic components comprises inserting the singulated microelectronic components in the pockets.
21 . The method of claim 19 , further comprising retrieving singulated microelectronic components from storage platform locations and placing the retrieved singulated microelectronic components on microelectronic component locations of a base substrate selected at least in part based on the respective sorts of the retrieved singulated microelectronic component.
22 . A method of processing microelectronic components, comprising:
retrieving a singulated microelectronic component from a carrier structure;
measuring parameter values of at least one of a nature of warpage and a degree of warpage of the singulated microelectronic component in an unconstrained state;
characterizing the singulated microelectronic component responsive to the measured parameter values of at least one of the nature and the degree of warpage; and
placing the characterized singulated microelectronic component on an unsingulated microelectronic component location of a base substrate or on another singulated microelectronic component on the base substrate based at least in part on the characterization of the placed microelectronic component.
23 . The method of claim 22 , wherein the carrier structure comprises a mounting film supported by a film frame, the singulated microelectronic component is one of an array of singulated microelectronic components on the mounting film, and the retrieving from the carrier structure is effected by a pick apparatus using a vacuum.
24 . The method of claim 23 , wherein the base substrate is a semiconductor wafer, the unsingulated microelectronic component locations are unsingulated die locations, the singulated microelectronic components are singulated semiconductor dice, and further comprising singulating the semiconductor dice on the mounting film prior to retrieving, measuring, and characterizing the singulated semiconductor die.
25 . The method of claim 22 , wherein the carrier structure comprises a rigid carrier wafer, the singulated microelectronic component is one of an array of singulated microelectronic components on the rigid carrier wafer, and the retrieving from the carrier structure is effected by a pick apparatus applying a vacuum.
26 . The method of claim 25 , wherein the base substrate is a semiconductor wafer, the unsingulated microelectronic component location is an unsingulated die location, the array of singulated microelectronic components are singulated semiconductor dice adhered to the carrier structure, and further comprising reducing adherence of at least one of the singulated semiconductor dice to be retrieved from the carrier structure prior to retrieving, measuring, and characterizing at least one of the singulated semiconductor dice.
27 . A microelectronic component processing apparatus, comprising:
a pick arm assembly operably coupled to a controller for retrieving singulated microelectronic components from a carrier structure;
a device for measuring at least one of a nature and a degree of warpage of a singulated microelectronic component supported in an unconstrained state, the device configured to move along at least one scanning path;
the controller comprising at least one microprocessor configured for initiating retrieval of a singulated microelectronic component from the carrier structure with a pick arm of the pick arm assembly using a vacuum, inverting the singulated microelectronic component on the pick arm, releasing the vacuum and initiating measurements of the at least one singulated microelectronic component on the pick arm by the device and receiving signals from the device including parameter values of data representative of the at least one of the nature and the degree of warpage of the at least one singulated microelectronic component; and
memory operably coupled to the controller for receiving and storing the data;
a component storage platform, comprising a number of pockets, each pocket configured for receiving a singulated microelectronic component, each pocket associated upon insertion therein of a singulated microelectronic component with the particular bin thereof, and further comprising storage memory for storing bin and associated pocket location of the inserted singulated microelectronic component; and
a device for retrieving singulated microelectronic components from the component storage platform and transferring each respective measured singulated microelectronic component to an unsingulated microelectronic component location on a base substrate if the bin of the respective retrieved singulated microelectronic component stored in storage memory indicates acceptability in terms of the nature and the degree of warpage for placement on the unsingulated microelectronic component location.
28 . The apparatus of claim 27 , wherein the carrier structure comprises a mounting film supported on a film frame or a rigid carrier substrate supporting a number of singulated microelectronic components.
29 . The apparatus of claim 27 , wherein the pick arm is further configured to transfer each singulated microelectronic component to one of a number of bins assigned by the controller based on the parameter values of data associated with each singulated microelectronic component.
30 . The apparatus of claim 29 , further comprising additional memory operably coupled to the controller and storing sets of predetermined parameter values of the nature and the degree of warpage, and the controller is further configured to sort the singulated microelectronic components for binning responsive to comparisons of parameter values of the data to predetermined parameter values of the sets stored in the additional memory.
31 . The apparatus of claim 30 , wherein the sets of parameter values stored in the additional memory reside in one or more lookup tables.
32 . The apparatus of claim 27 , wherein the component storage platform further comprises one of a tape of a tape and reel apparatus, or a chip tray.
33 . The apparatus of claim 27 , wherein the base substrate is a semiconductor wafer.
34 . The apparatus of claim 27 , wherein the device for retrieving singulated microelectronic components from the component storage platform and transferring each respective singulated microelectronic component to an unsingulated microelectronic component location on a base substrate is further operably coupled to memory for storing a location and bin of each singulated microelectronic component transferred to the base substrate.
35 . The apparatus of claim 27 , wherein the device for retrieving singulated microelectronic components from the component storage platform and transferring each respective singulated microelectronic component to an unsingulated microelectronic component location on a base substrate is further configured to, upon retrieving a respective singulated microelectronic component from the component storage platform, comparing a bin of the respective singulated microelectronic component stored in storage memory to locations and associated bins of singulated microelectronic components stored in storage memory of an existing layer of singulated microelectronic components of a microelectronic component stack on the base substrate and identifying a singulated microelectronic component of available microelectronic components of the existing layer for transfer thereto of the respective singulated microelectronic component thereon to minimize at least one of warpage mismatch or bond line height variance.
36 . The apparatus of claim 27 , wherein the device for retrieving singulated microelectronic components from the component storage platform and transferring each respective singulated microelectronic component to an unsingulated microelectronic component location on a base substrate is further configured to, upon retrieving a respective singulated microelectronic component from the component storage platform for transfer to a next to uppermost microelectronic component location of a microelectronic component stack, determining if the bin of the respective retrieved singulated microelectronic component indicates acceptability in terms of the nature and the degree of warpage for placement within the microelectronic component stack under a substantially planar uppermost microelectronic component.