Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Risto Kurppa"'
Publikováno v:
Microelectronic Engineering. 104:114-119
We prove that we can, using contact resistance as a tool, determine the instant when the bonding process starts, i.e. microwelds start to form during ultrasonic bonding. This knowledge permits us to reduce the uncertainty in the estimated bonded area
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::51e5954605a342f766f0483d802429ae
https://doi.org/10.1016/j.mee.2012.12.003
https://doi.org/10.1016/j.mee.2012.12.003
Autor:
Aino Tietäväinen, Risto Kurppa, Edward Hæggström, Antti Meriläinen, Timo Rauhala, Henri Seppänen
Publikováno v:
Microelectronics Reliability. 54:1452-1454
We employ a real-time nondestructive contact resistance method to rapidly predict the end state of ultrasonic wire bonds. We classified 64 bonds as either successful (bond attached) or failed (bond unattached) with a support vector machine method. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d04bcf50808f75ef7440d10f81bfe1f9
https://doi.org/10.1016/j.microrel.2014.02.024
https://doi.org/10.1016/j.microrel.2014.02.024
Publikováno v:
Microelectronic Engineering
We present a novel ultrasonic wire-to-wire bonding method for bonding two micrometer-thick metal wires together. A special jig and an industrial wire bonder perform the bonding. This wire-to-wire bonding is the core unit process to produce space teth
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a42d88d60a64c01416649190e46b21f6
https://doi.org/10.1016/j.mee.2011.07.002
https://doi.org/10.1016/j.mee.2011.07.002
Autor:
Martin Simonsson, Pekka Janhunen, S.K. Kiprich, Risto Kurppa, Henri Seppänen, Timo Rauhala, Jukka Ukkonen, Edward Hæggström
Publikováno v:
Review of Scientific Instruments
We produced a 1 km continuous piece of multifilament electric solar wind sail tether of μm-diameter aluminum wires using a custom made automatic tether factory. The tether comprising 90 704 bonds between 25 and 50 μm diameter wires is reeled onto a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fbf72bcb2b50cdeed5fa54d87b44fc53
https://pubmed.ncbi.nlm.nih.gov/24089861
https://pubmed.ncbi.nlm.nih.gov/24089861
Autor:
Pekka Salminen, H. Koivisto, Mart Noorma, Olaf Krömer, Greger Thornell, Jukka Ukkonen, Jouni Envall, Roland Rosta, Alexander N. Obraztsov, Giovanni Mengali, Lutz Richter, Olli Tarvainen, Henri Seppänen, Petri Toivanen, S. Merikallio, Risto Kurppa, Henrik Kratz, Alessandro Antonio Quarta, Edward Hæggström, Jouni Polkko, J. Kauppinen, S.K. Kiprich, Antti Nuottajärvi, Taneli Kalvas, S. Lätt, Pekka Janhunen
Publikováno v:
Review of Scientific Instruments
The electric solar wind sail (E-sail) is a space propulsion concept that uses the natural solar wind dynamic pressure for producing spacecraft thrust. In its baseline form, the E-sail consists of a number of long, thin, conducting, and centrifugally
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f83083c7edf597584714830f9fcb4854
https://pubmed.ncbi.nlm.nih.gov/21133454
https://pubmed.ncbi.nlm.nih.gov/21133454
Autor:
Risto Kurppa, Edward Haggstrom, Heikki Räikkönen, Henri Seppänen, Ville Heikkinen, Ivan Kassamakov, J. Aaltonen
Publikováno v:
2010 IEEE International Ultrasonics Symposium.
Working surface of the ultrasonic bonding wedge must adhere to tight specifications to permit strong and repeatable ultrasonic wire bonding. Even minute changes in the wedge surface reduce the yield, especially when bonding to fragile materials. Cons
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8225a877bbd51599ccef928ab8f7f02b
https://doi.org/10.1109/ultsym.2010.5935926
https://doi.org/10.1109/ultsym.2010.5935926
Autor:
Pekka Janhunen, Petri Toivanen, Sini Merikallio, Jouni Polkko, Edward Häggström, Henri Seppänen, Risto Kurppa, Jukka Ukkonen, Tuomo Ylitalo, Sergiy Kiprich, Hannu Koivisto, Taneli Kalvas, Olli Tarvainen, Janne Kauppinen, Greger Thornell, Henrik Kratz, Johan Sundqvist, Tor-Arne Grönland, Håkan Johansson, Pelle Rangsten, Emil Vinterhav, Mart Noorma, Jouni Envall, Silver Latt, Viljo Allik, Kaupo Voormansik, Urmas Kvell, Jean-Pierre Lebreton, Martti Hallikainen, Jaan Praks, Olaf Kromer, Roland Rosta, Pekka Salminen, Giovanni Mengali, Alessandro Quarta, Generoso Aliasi, Salvo Marcuccio, Pierpaolo Pergola, Nicola Giusti
Publikováno v:
Aalto University
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::315b8353cda0504a76eafb98554a5858
https://research.aalto.fi/en/publications/251ad39a-5dc8-42a0-9984-3fe76224f709
https://research.aalto.fi/en/publications/251ad39a-5dc8-42a0-9984-3fe76224f709
