摘要:
Approaches for substantially removing bulk aluminum nitride (140) from one or more layers (150) epitaxially grown on the bulk aluminum nitride (AIN) are discussed. The bulk AIN (140) is exposed to an etchant during an etching process. During the etching process, the thickness of the bulk AIN can be measured and used to control etching.
摘要:
A method for substantially simultaneously bonding multiple semiconductor chips (116A, 116B) of different height profiles on a flexible substrate (100) comprises: providing a flexible substrate (100) with printed conductive traces (102); placing an anisotropic conductive adhesive (ACA) (104) over at least portions of the printed conductive traces (102) of the flexible substrate (100), the ACA (104) including a thermosetting adhesive and conductive spherical elements; tacking the ACA (104) in place by application of heat and pressure for a predetermined time; positioning and orientating a first side of each of multiple semiconductor chips (116A, 116B) to align with selected locations of the printed conductive traces (102) of the flexible substrate (100) lying under the ACA (104), wherein at least one of the multiple semiconductor chips (116A, 116B) has a height profile different from at least one other one of the multiple semiconductor chips (116A, 116B); curing the thermosetting adhesive of the ACA (104) by applying heat and pressure, wherein the pressure is applied, with a deformable bonding head (206) (a compliant plug made of e.g. neoprene rubber), an expandable elastic membrane (304) or a plurality of movable pins (402, 506) held in a support structure (e.g., a pin screen) (404) in combination with an elastic plug (406) or with an elastic membrane (502), to a second side of each of the multiple semiconductor chips (116A, 116B), the applying of the pressure pressing and deforming the conductive spherical elements of the ACA (104), wherein electrical contact is made between the semiconductor chips (116A, 116B) and at least portions of the printed conductive traces (102). A corresponding semiconductor chip bonding device (200, 300, 400, 500) is also disclosed.
摘要:
A method for substantially simultaneously bonding multiple semiconductor chips (116A, 116B) of different height profiles on a flexible substrate (100) comprises: providing a flexible substrate (100) with printed conductive traces (102); placing an anisotropic conductive adhesive (ACA) (104) over at least portions of the printed conductive traces (102) of the flexible substrate (100), the ACA (104) including a thermosetting adhesive and conductive spherical elements; tacking the ACA (104) in place by application of heat and pressure for a predetermined time; positioning and orientating a first side of each of multiple semiconductor chips (116A, 116B) to align with selected locations of the printed conductive traces (102) of the flexible substrate (100) lying under the ACA (104), wherein at least one of the multiple semiconductor chips (116A, 116B) has a height profile different from at least one other one of the multiple semiconductor chips (116A, 116B); curing the thermosetting adhesive of the ACA (104) by applying heat and pressure, wherein the pressure is applied, with a deformable bonding head (206), an expandable elastic membrane (304) or a plurality of movable pins (402) held in a support structure (e.g., a pin screen) (404), to a second side of each of the multiple semiconductor chips (116A, 116B), the applying of the pressure pressing and deforming the conductive spherical elements of the ACA (104), wherein electrical contact is made between the semiconductor chips (116A, 116B) and at least portions of the printed conductive traces (102). A corresponding semiconductor chip bonding device (200, 300, 400) is also disclosed.
摘要:
Provided is a manufacturing process for electronic circuit components such as bare dies, and packaged integrated chips, among other configurations, to form electronic assemblies. The surface of the electronic circuit component carries electronic elements such as conductive traces and/or other configurations including contact pads. A method for forming an electronic assembly includes providing a tacky layer (302A). Then an electronic circuit component (304A) is provided having a first side and a second side, where the first side carries the electronic elements. The first side of the electronic circuit component (304A) is positioned into contact with the tacky layer (302A). A bonding material (306A) is then deposited to a portion of the adhesive layer (302A) that is not covered by the first side of the electronic circuit component (304A), to a depth which is sufficient to cover at least a portion of the electronic circuit component (304A). The bonding material (306A) is then fixed or cured into a fixed or cured bonding material, and the tacky layer (302A) is removed. By these operations, the electronic circuit component is held in a secure attachment by the fixed or cured bonding material (306A), and circuit connections (308B) may be made.
摘要:
Approaches for substantially removing bulk aluminum nitride (140) from one or more layers (150) epitaxially grown on the bulk aluminum nitride (AIN) are discussed. The bulk AIN (140) is exposed to an etchant during an etching process. During the etching process, the thickness of the bulk AIN can be measured and used to control etching.
摘要:
A method for substantially simultaneously bonding multiple semiconductor chips (116A, 116B) of different height profiles on a flexible substrate (100) comprises: providing a flexible substrate (100) with printed conductive traces (102); placing an anisotropic conductive adhesive (ACA) (104) over at least portions of the printed conductive traces (102) of the flexible substrate (100), the ACA (104) including a thermosetting adhesive and conductive spherical elements; tacking the ACA (104) in place by application of heat and pressure for a predetermined time; positioning and orientating a first side of each of multiple semiconductor chips (116A, 116B) to align with selected locations of the printed conductive traces (102) of the flexible substrate (100) lying under the ACA (104), wherein at least one of the multiple semiconductor chips (116A, 116B) has a height profile different from at least one other one of the multiple semiconductor chips (116A, 116B); curing the thermosetting adhesive of the ACA (104) by applying heat and pressure, wherein the pressure is applied, with a deformable bonding head (206), an expandable elastic membrane (304) or a plurality of movable pins (402) held in a support structure (e.g., a pin screen) (404), to a second side of each of the multiple semiconductor chips (116A, 116B), the applying of the pressure pressing and deforming the conductive spherical elements of the ACA (104), wherein electrical contact is made between the semiconductor chips (116A, 116B) and at least portions of the printed conductive traces (102). A corresponding semiconductor chip bonding device (200, 300, 400) is also disclosed.
摘要:
Provided is a manufacturing process for electronic circuit components such as bare dies, and packaged integrated chips, among other configurations, to form electronic assemblies. The surface of the electronic circuit component carries electronic elements such as conductive traces and/or other configurations including contact pads. A method for forming an electronic assembly includes providing a tacky layer (302A). Then an electronic circuit component (304A) is provided having a first side and a second side, where the first side carries the electronic elements. The first side of the electronic circuit component (304A) is positioned into contact with the tacky layer (302A). A bonding material (306A) is then deposited to a portion of the adhesive layer (302A) that is not covered by the first side of the electronic circuit component (304A), to a depth which is sufficient to cover at least a portion of the electronic circuit component (304A). The bonding material (306A) is then fixed or cured into a fixed or cured bonding material, and the tacky layer (302A) is removed. By these operations, the electronic circuit component is held in a secure attachment by the fixed or cured bonding material (306A), and circuit connections (308B) may be made.
摘要:
Provided is a manufacturing process for electronic circuit components such as bare dies, and packaged integrated chips, among others, where the surface of the electronic circuit component is at the same level as the associated substrate, the surface of the electronic circuit component holding connection pads. A gap exists between the electronic circuit component, and the end of an opening within the substrate. This gap is filled with a filler material, such as a bonding material. The bonding material also used to encapsulate or bond together the back side of the substrate and electronic circuit component. During the manufacturing process, the front surface of the electronic circuit component (which includes the contact pads) and the front surface of the substrate which includes electronic circuitry are held in an adhesive relationship by a flat material having an upper surface which includes adhesive or sticky material (such as PDMS). Once the flat material is removed the planar flat or level upper surface can readily accept the formation of conductive traces by the use of inkjet printing or other technologies.