公开(公告)号：US20170197281A1

公开(公告)日：2017-07-13

申请号：US15326180

申请日：2015-07-15

Applicant: ALPHA ASSEMBLY SOLUTIONS INC.

Inventor： Pritha Choudhury ,  Morgana De Avila Ribas ,  Sutapa Mukherjee ,  Siuli Sarkar ,  Ranjit Pandher ,  Ravindra Bhatkal ,  Bawa Singh

IPC: B23K35/26 ,  H01L23/00 ,  B23K1/08 ,  B23K1/00 ,  C22C13/00

CPC classification number: B23K35/262 ,  B23K1/0016 ,  B23K1/002 ,  B23K1/0056 ,  B23K1/085 ,  B23K35/00 ,  B23K35/0222 ,  B23K35/0227 ,  B23K35/0233 ,  B23K35/0238 ,  B23K35/0244 ,  B23K35/025 ,  B23K35/26 ,  B23K2101/40 ,  B23K2101/42 ,  C22C13/00 ,  C22C13/02 ,  H01L24/29 ,  H01L24/83 ,  H01L2224/29101 ,  H01L2224/29105 ,  H01L2224/29109 ,  H01L2224/29111 ,  H01L2224/29113 ,  H01L2224/29117 ,  H01L2224/29123 ,  H01L2224/29124 ,  H01L2224/29138 ,  H01L2224/29139 ,  H01L2224/29144 ,  H01L2224/29147 ,  H01L2224/29149 ,  H01L2224/29155 ,  H01L2224/29157 ,  H01L2224/2916 ,  H01L2224/29163 ,  H01L2224/29166 ,  H01L2224/29169 ,  H01L2224/29171 ,  H01L2224/29172 ,  H01L2224/2918 ,  H01L2224/83815 ,  H01L2924/01015 ,  H01L2924/0102 ,  H01L2924/01032 ,  H01L2924/01034 ,  H01L2924/01052 ,  H01L2924/01058

Abstract: A lead-free, antimony-free solder alloy_suitable for use in electronic soldering applications. The solder alloy comprises (a) from 1 to 4 wt. % silver; (b) from 0.5 to 6 wt. % bismuth; (c) from 3.55 to 15 wt. % indium, (d) 3 wt. % or less of copper; (e) one or more optional elements and the balance tin, together with any unavoidable impurities.

公开(公告)号：US12115602B2

公开(公告)日：2024-10-15

申请号：US17309818

申请日：2019-12-26

Applicant: ALPHA ASSEMBLY SOLUTIONS INC.

Inventor： Ranjit Pandher ,  Niveditha Nagarajan ,  Anil Kumar ,  Morgana de Avila Ribas ,  Gyan Dutt ,  Siuli Sarkar ,  Carl Bilgrien

IPC: B23K35/00 ,  B23K35/26 ,  C22C13/00

CPC classification number: B23K35/262 ,  C22C13/00

Abstract: A lead-free solder alloy comprising: from 1 to 9 wt. % copper, at least one of: from greater than 0 to 1 wt. % nickel, from greater than 0 to 10 wt. % germanium, from greater than 0 to 10 wt. % manganese, from greater than 0 to 10 wt. % aluminium, from greater than 0 to 10 wt. % silicon, from greater than 0 to 9 wt. % bismuth, from greater than 0 to 5 wt. % indium, from greater than 0 to 1 wt. % titanium, from greater than 0 to 2 wt. % lanthanum, from greater than 0 to 2 wt. % neodymium, optionally one or more of: up to 1 wt. % for: chromium, gallium, cobalt, iron, phosphorous, gold, tellurium, selenium, calcium, vanadium, molybdenum, platinum, magnesium; up to 5 wt. % silver, up to 1 wt. % zinc, up to 2 wt. % rare earth metals, excluding lanthanum and neodymium, and the balance tin together with any unavoidable impurities.

公开(公告)号：US12113039B2

公开(公告)日：2024-10-08

申请号：US17245397

申请日：2021-04-30

Applicant: ALPHA ASSEMBLY SOLUTIONS INC.

Inventor： Shamik Ghoshal ,  Nirmalya Kumar Chaki ,  Poulami Sengupta Roy ,  Siuli Sarkar ,  Anubhav Rustogi

IPC: H01L23/00 ,  B22F1/052 ,  B22F1/102 ,  B22F1/107 ,  B22F1/17 ,  B22F7/04 ,  B23K1/00 ,  B23K35/02 ,  B23K35/30 ,  B23K35/36 ,  B23K35/365 ,  B23K101/40 ,  B23K103/00 ,  H01B1/22 ,  H01L25/00 ,  H05K3/32 ,  H10K50/842

CPC classification number: H01L24/29 ,  B22F1/052 ,  B22F1/102 ,  B22F1/107 ,  B22F1/17 ,  B22F7/04 ,  B23K1/0016 ,  B23K35/025 ,  B23K35/3006 ,  B23K35/3601 ,  B23K35/3613 ,  B23K35/3618 ,  B23K35/365 ,  H01B1/22 ,  H01L24/11 ,  H01L24/13 ,  H01L24/27 ,  H01L24/32 ,  H01L24/81 ,  H01L24/83 ,  B22F2007/047 ,  B22F2301/255 ,  B22F2302/45 ,  B23K2101/40 ,  B23K2103/56 ,  H01L24/16 ,  H01L24/48 ,  H01L24/73 ,  H01L24/92 ,  H01L25/50 ,  H01L2224/0401 ,  H01L2224/04026 ,  H01L2224/05155 ,  H01L2224/05644 ,  H01L2224/11003 ,  H01L2224/1132 ,  H01L2224/11334 ,  H01L2224/131 ,  H01L2224/13339 ,  H01L2224/13347 ,  H01L2224/13355 ,  H01L2224/13387 ,  H01L2224/1339 ,  H01L2224/13439 ,  H01L2224/1349 ,  H01L2224/13499 ,  H01L2224/16227 ,  H01L2224/27003 ,  H01L2224/271 ,  H01L2224/27332 ,  H01L2224/27436 ,  H01L2224/27505 ,  H01L2224/2929 ,  H01L2224/29339 ,  H01L2224/29347 ,  H01L2224/29355 ,  H01L2224/29387 ,  H01L2224/2939 ,  H01L2224/29439 ,  H01L2224/2949 ,  H01L2224/29499 ,  H01L2224/32145 ,  H01L2224/32146 ,  H01L2224/32225 ,  H01L2224/32245 ,  H01L2224/48227 ,  H01L2224/48247 ,  H01L2224/73265 ,  H01L2224/81075 ,  H01L2224/81192 ,  H01L2224/81203 ,  H01L2224/8121 ,  H01L2224/8184 ,  H01L2224/81948 ,  H01L2224/83075 ,  H01L2224/83191 ,  H01L2224/83192 ,  H01L2224/83203 ,  H01L2224/8321 ,  H01L2224/83439 ,  H01L2224/83447 ,  H01L2224/8384 ,  H01L2224/83948 ,  H01L2224/92247 ,  H01L2224/94 ,  H01L2924/00014 ,  H01L2924/0665 ,  H01L2924/12041 ,  H01L2924/12044 ,  H01L2924/1461 ,  H01L2924/20102 ,  H01L2924/20103 ,  H01L2924/20104 ,  H01L2924/20105 ,  H01L2924/20106 ,  H01L2924/20107 ,  H01L2924/20108 ,  H01L2924/20109 ,  H01L2924/2011 ,  H01L2924/206 ,  H01L2924/2064 ,  H05K3/321 ,  H10K50/8426 ,  H01L2224/83203 ,  H01L2924/00012 ,  H01L2224/94 ,  H01L2224/83 ,  H01L2224/29339 ,  H01L2924/0105 ,  H01L2224/29339 ,  H01L2924/01046 ,  H01L2224/29339 ,  H01L2924/01047 ,  H01L2224/29339 ,  H01L2924/01029 ,  H01L2224/29339 ,  H01L2924/01028 ,  H01L2224/29439 ,  H01L2924/00014 ,  H01L2224/29355 ,  H01L2924/00014 ,  H01L2224/29347 ,  H01L2924/01028 ,  H01L2224/29347 ,  H01L2924/01028 ,  H01L2924/0103 ,  H01L2224/29387 ,  H01L2924/0493 ,  H01L2924/01004 ,  H01L2224/2949 ,  H01L2924/00012 ,  H01L2224/2939 ,  H01L2924/0665 ,  H01L2224/271 ,  H01L2924/00014 ,  H01L2224/27436 ,  H01L2924/00014 ,  H01L2224/94 ,  H01L2224/27 ,  H01L2224/05155 ,  H01L2924/00014 ,  H01L2224/05644 ,  H01L2924/00014 ,  H01L2224/83439 ,  H01L2924/00014 ,  H01L2224/83447 ,  H01L2924/01074 ,  H01L2224/8321 ,  H01L2924/00014 ,  H01L2224/81203 ,  H01L2924/00012 ,  H01L2224/94 ,  H01L2224/81 ,  H01L2224/13339 ,  H01L2924/0105 ,  H01L2224/13339 ,  H01L2924/01046 ,  H01L2224/13339 ,  H01L2924/01047 ,  H01L2224/13339 ,  H01L2924/01029 ,  H01L2224/13339 ,  H01L2924/01028 ,  H01L2224/13439 ,  H01L2924/00014 ,  H01L2224/13355 ,  H01L2924/00014 ,  H01L2224/13347 ,  H01L2924/01028 ,  H01L2224/13347 ,  H01L2924/01028 ,  H01L2924/0103 ,  H01L2224/13387 ,  H01L2924/0493 ,  H01L2924/01004 ,  H01L2224/1349 ,  H01L2924/00012 ,  H01L2224/1339 ,  H01L2924/0665 ,  H01L2224/131 ,  H01L2924/00014 ,  H01L2224/11436 ,  H01L2924/00014 ,  H01L2224/94 ,  H01L2224/11 ,  H01L2224/8121 ,  H01L2924/00014 ,  H01L2924/00014 ,  H01L2224/45099 ,  H01L2224/1132 ,  H01L2924/00014 ,  H01L2224/73265 ,  H01L2224/32225 ,  H01L2224/48227 ,  H01L2924/00012 ,  H01L2224/73265 ,  H01L2224/32245 ,  H01L2224/48247 ,  H01L2924/00012 ,  H01L2224/73265 ,  H01L2224/32145 ,  H01L2224/48247 ,  H01L2924/00 ,  H01L2224/73265 ,  H01L2224/32145 ,  H01L2224/48227 ,  H01L2924/00 ,  H01L2224/92247 ,  H01L2224/73265 ,  H01L2224/32225 ,  H01L2224/48227 ,  H01L2924/00 ,  H01L2224/92247 ,  H01L2224/73265 ,  H01L2224/32245 ,  H01L2224/48247 ,  H01L2924/00

Abstract: A sintering powder comprising:



a first type of metal particles having a mean longest dimension of from 100 nm to 50 μm.

公开(公告)号：US20220169905A1

公开(公告)日：2022-06-02

申请号：US17493247

申请日：2021-10-04

Applicant: Alpha Assembly Solutions Inc.

Inventor： Shamik Ghosal ,  Ranjit Pandher ,  Oscar Khaselev ,  Ravi Bhatkal ,  Rahul Raut ,  Bawa Singh ,  Morgana de Avila Ribas ,  Siuli Sarkar ,  Sutapa Mukherjee ,  Sathish Kumar ,  Remya Chandran ,  Pavan Vishwanath ,  Ashok Pachamuthu ,  Monnir Boureghda ,  Nitin Desai ,  Anna Lifton ,  Nirmalya Kumar Chaki

IPC: C09K5/14 ,  C01G5/00 ,  C09C1/62 ,  C09C3/08 ,  B82Y30/00 ,  B22F1/05 ,  B22F1/16 ,  B22F1/052 ,  B22F1/102

Abstract: A sintering powder comprising: a particulate having a mean longest diameter of less than 10 microns, wherein at least some of the particles forming the particulate comprise a metal at least partially coated with a capping agent. A sintering paste and sintering film comprising the sintering powder. A method for making a sintered joint by sintering the sintering powder, paste, or film in the vicinity of two or more workpieces.

公开(公告)号：US10894302B2

公开(公告)日：2021-01-19

申请号：US15318895

申请日：2015-06-22

Applicant: ALPHA ASSEMBLY SOLUTIONS INC.

Inventor： Shamik Ghoshal ,  Remya Chandran ,  Sutapa Mukherjee ,  Siuli Sarkar ,  Ranjit Pandher ,  Bawa Singh

IPC: B23K35/02 ,  B23K35/30 ,  B23K35/32 ,  B23K35/36 ,  B22F1/00 ,  B22F1/02 ,  B22F9/24 ,  C09C1/62

Abstract: A sintering powder, wherein a least a portion of the particles making up the sintering powder comprise: a core comprising a first material; and a shell at least partially coating the core, the shell comprising a second material having a lower oxidation potential than the first material.

公开(公告)号：US20190194517A1

公开(公告)日：2019-06-27

申请号：US16289789

申请日：2019-03-01

Applicant: Alpha Assembly Solutions Inc.

Inventor： Shamik Ghosal ,  Ranjit Pandher ,  Oscar Khaselev ,  Ravi Bhatkal ,  Rahul Raut ,  Bawa Singh ,  Morgana de Avila Ribas ,  Siuli Sarkar ,  Sutapa Mukherjee ,  Sathish Kumar ,  Remya Chandran ,  Pavan Vishwanath ,  Ashok Pachamuthu ,  Monnir Boureghda ,  Nitin Desai ,  Anna Lifton ,  Nirmalya Kumar Chaki

IPC: C09K5/14 ,  B22F1/02 ,  B22F1/00 ,  C09C3/08 ,  B82Y30/00 ,  C01G5/00 ,  C09C1/62

CPC classification number: C09K5/14 ,  B22F1/0011 ,  B22F1/0014 ,  B22F1/0018 ,  B22F1/0062 ,  B22F1/0074 ,  B22F1/02 ,  B22F2001/0066 ,  B82Y30/00 ,  C01G5/00 ,  C01P2002/72 ,  C01P2002/88 ,  C01P2004/04 ,  C01P2004/53 ,  C01P2004/61 ,  C01P2004/64 ,  C01P2006/22 ,  C01P2006/32 ,  C01P2006/40 ,  C09C1/62 ,  C09C3/08 ,  H01L2924/0002 ,  H01L2924/00

Abstract: A sintering powder comprising: a particulate having a mean longest diameter of less than 10 microns, wherein at least some of the particles forming the particulate comprise a metal at least partially coated with a capping agent. A sintering paste and sintering film comprising the sintering powder. A method for making a sintered joint by sintering the sintering powder, paste, or film in the vicinity of two or more workpieces.

公开(公告)号：US20180102464A1

公开(公告)日：2018-04-12

申请号：US15286759

申请日：2016-10-06

Applicant: Alpha Assembly Solutions Inc.

Inventor： Morgana de Avila Ribas ,  Pritha Choudhury ,  Siuli Sarkar ,  Ranjit Pandher ,  Nicholas G. Herrick ,  Amit Patel ,  Ravindra M Bhatkal ,  Bawa Singh

IPC: H01L33/62 ,  H01L23/00 ,  H01L33/64 ,  B23K1/00 ,  B23K1/08 ,  B23K1/002 ,  B23K1/005 ,  B23K35/26 ,  C22C13/02

CPC classification number: H01L33/62 ,  B23K1/0016 ,  B23K1/002 ,  B23K1/0056 ,  B23K1/085 ,  B23K35/262 ,  C22C13/02 ,  H01L24/13 ,  H01L24/29 ,  H01L33/641 ,  H01L33/647 ,  H01L2224/13211 ,  H01L2224/13313 ,  H01L2224/1332 ,  H01L2224/13339 ,  H01L2224/13347 ,  H01L2224/13355 ,  H01L2224/29211 ,  H01L2224/29313 ,  H01L2224/2932 ,  H01L2224/29339 ,  H01L2224/29347 ,  H01L2224/29355 ,  H01L2924/01058 ,  H01L2924/014 ,  H01L2924/12041 ,  H01L2924/20106 ,  H01L2924/351 ,  H01L2933/0066

Abstract: Improved electrical and thermal properties of solder alloys are achieved by the use of micro-additives in solder alloys to engineer the electrical and thermal properties of the solder alloys and the properties of the reaction layers between the solder and the metal surfaces. The electrical and thermal conductivity of alloys and that of the reaction layers between the solder and the -metal surfaces can be controlled over a wide range of temperatures. The solder alloys produce stable microstructures wherein such stable microstructures of these alloys do not exhibit significant changes when exposed to changes in temperature, compared to traditional interconnect materials.

公开(公告)号：US20170304955A1

公开(公告)日：2017-10-26

申请号：US15644331

申请日：2017-07-07

Applicant: Alpha Assembly Solutions Inc.

Inventor： Ranjit Pandher ,  Bawa Singh ,  Siuli Sarkar ,  Sujatha Chegudi ,  Anil K. N. Kumar ,  Kamanio Chattopadhyay ,  Dominic Lodge ,  Morgana de Avila Ribas

IPC: B23K35/26 ,  B23K1/005 ,  B23K35/02 ,  C22C13/02 ,  C22C12/00 ,  B23K1/002

CPC classification number: B23K35/262 ,  B23K1/002 ,  B23K1/0056 ,  B23K35/0222 ,  B23K35/0227 ,  B23K35/0233 ,  B23K35/0244 ,  B23K35/025 ,  B23K35/264 ,  B23K2101/42 ,  C22C12/00 ,  C22C13/02 ,  Y10T403/479

Abstract: The invention provides an alloy, preferably a lead-free solder alloy, comprising: from 35 to 59% wt Bi; from 0 to .0 wt % Ag; from 0 to 1.0% wt Au; from 0 to 1.0% wt Cr; from 0 to 2.0% wt In; from 0 to 1.0% wt P; from 0 to 1.0% wt Sb; from 0 to 1.0% wt Sc; from 0 to 1.0% wt Y; from 0 to 1.0% wt Zn; from 0 to 1.0% wt rare earth elements; one or more of: 10 from greater than 0 to 1.0% wt Al; from 0.01 to 1.0% wt Ce; from greater than 0 to 1.0% wt Co; from greater than 0 to .0% wt Cu; from 0.001 to 1.0% wt Ge; from greater than 0 to .0% wt Mg; from greater than 0 to 1.0% wt Mn; from 0.01 to 1.0% wt Ni; and from greater than 0 to 1.0% wt Ti, and the 1 balance Sn, together with any unavoidable impurities.

公开(公告)号：US20250153280A1

公开(公告)日：2025-05-15

申请号：US19019729

申请日：2025-01-14

Applicant: Alpha Assembly Solutions Inc.

Inventor： Rahul Raut ,  Nirmalya Kumar Chaki ,  Bawa Singh ,  Ranjit Pandher ,  Siuli Sarkar

IPC: B23K35/26 ,  B23K35/02 ,  B23K35/362 ,  B23K101/42 ,  B23K103/08

Abstract: A solder paste comprising: a solder alloy, and a solder flux comprising an activator, wherein the activator comprises an organic acid activator and an organic amine activator, and wherein the molar ratio of organic acid activator to organic amine activator is from 0.8 to 2.5. A method of forming a solder joint comprising: (i) providing two or more work pieces to be joined; (ii) providing the solder paste of claim 1; and (iii) heating the solder paste in the vicinity of the work pieces to be joined.

公开(公告)号：US12278022B2

公开(公告)日：2025-04-15

申请号：US18376896

申请日：2023-10-05

Applicant: Alpha Assembly Solutions Inc.

Inventor： Narahari Pujari ,  Bawa Singh ,  Ravi Bhatkal ,  Siuli Sarkar ,  Anubhav Rustogi

IPC: H01B1/22 ,  B22F1/052 ,  B22F1/068 ,  B22F1/107 ,  B22F1/17 ,  B23K35/02 ,  B23K35/30 ,  B23K35/36 ,  B23K35/362 ,  H05K1/09 ,  H05K1/18 ,  H05K3/12

Abstract: A conductive paste and method of manufacturing thereof. The conductive paste comprises conductive particles dispersed in an organic medium, the organic medium comprising: (a) a solvent; and (b) a binder comprising a polyester. The conductive paste typically comprises silver and may contain various other additives. A stretchable conductive layer can be formed by curing the conductive paste.