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Novel bonding method of low temperature cofired ceramic tapes

100%

Jurków D. , Golonka L.

tom T. 36, nr 4

139-148

The lamination determines quality and geometry of the fabricated ceramic microsystems. The thermo-compression method is commonly used. In this technique the Low Temperature Co-Fired Ceramics (LTCC) tapes are joined together at high pressure and temperature. Cold Chemical Lamination (CCL) is presented in the paper. It is a solvent-base method used for green ceramic tape bonding. The tapes are covered by film of the special liquid. Then the ceramics are put in a stack and laminated at low pressure below 0.5 MPa. The lamination quality is investigated. The cross-section of the close chambers is examined by optical and Scanning Electron Microscopy. The solvent influences the basic electrical properties of the thermistors composition (ESL NTC-2114), sheet resistance at a room temperature, R=f(T) dependence, B constant and a long term stability is analysed. The lead free ESL 41020 tape is used during the experiment. The thermistor composition is screen printed on the LTCC substrate. The R=f(T) dependence is measured by the Agilent 34970A data acquisition unit. Long--term stability is investigated by annealing at 150°C for 200 h.

Jakość połączenia warstw folii niskotemperaturowej ceramiki współwypalanej (LTCC) oraz geometria komór silnie zależą od procesu laminacji. Obecnie powszechnie stosowaną metodą do produkcji ceramicznych układów wielowarstwowych jest laminacja termokompresyjna. Przy jej zastosowaniu warstwy są łączone w wysokiej temperaturze i ciśnieniu. W artykule przedstawiono alternatywną metodę łączenia folii niskotemperaturowej ceramiki. Warstwy są łączone za pomocą rozpuszczalników, które zmiękczają powierzchnie łączonych folii. W kolejnym etapie warstwy są ze sobą wstępnie łączone i dociskane niewielkim ciśnieniem (poniżej 0,5 MPa). W artykule przedstawiono jakość połączeń uzyskanych za pomocą nowej metody, jak również wpływ rozpuszczalnika na parametry elektryczne grubowarstwowych elementów biernych.

Laminacja czy dublaż : próba uściślenia pojęć

100%

Potocka A. D.

2000

nr 3

325-328

The determination of a uniform terminology in conservation always encountered numerous obstacles. Different names, associated with various workshop and historical traditions, to mention lengthy debates concerning tinting or grounding, unfortunately lead to misunderstandings or at least a different interpretation of numerous phenomena. Whenever this issue concerns the individual reception of the state of the preservation of an object or its structure, there always exists a large margin of understanding. Difficulties emerge when this question pertains to conservation terms borrowed from other domains of science (physics, chemistry, material engineering, etc.), extremely frequently interpreted in assorted manners. This careless adaptation of certain terms results in a falsification of the meaning of a given world or the entire phenomenon. More, the conservators themselves define the same activity in different ways, depending on the context. It should be added that similar problems are tackled by conservators of works of art in many other countries. Hence the frequent initiatives of preparing terminological and thematic dictionaries, undertaken by the AIC in the U.S.A. and ICOM in Europe. Due to their nature and the character of damage, silk objects are conserved by specialists representing numerous domains — conservators of fabrics, canvas paintings and paper. Their cooperation is frequently indispensable, although we immediately encounter a different interpretation of identical activities, especially the reinforcement of the base. An analysis of the above example and a comparison of conservation and material terminology make it possible to distinguish certain fundamental concepts, such as lamination, gluing with laminates and duplication. The term lamination concerns deeply penetrating, irreversible operations or those difficult to remove, with the application of synthetic glues and multi-strata structures; gluing with laminates denotes non-invasion, reversible, transparent and one-sided reinforcement, similar to contact duplication using synthetic glues, while the term duplication signifies one-sided reversible reinforcement, with the employment of natural or synthetic means. All conservation consisting of the introduction and addition to a weakened monument of suitably selected means with a needle and thread should be described as the reinforcement of the object on a secondary, protective textile base.

Konstrukcyjne połączenia silikonowe w giętych na zimno szybach SSG

100%

Nardini V. , Doebbel F.

2018

tom R. 23, nr 4

36--41

Sposoby zapobiegania delaminacji. Wskazówki na poszczególnych etapach inwestycji

84%

Ładziak J. , Malewski A.

Świat Szkła

2017

tom R. 22, nr 5