Hoechst Aktiengesellschaft

Tsunetoshi Sugiyama

Yusuke Takano

Shizuo Ogura

Wen-Bing Kang

Nu Yu

A detecting apparatus capable of supporting even narrow wire widths and of detecting defects of wires in a non-contact manner is provided. The detecting apparatus comprises an optical sensor, a sensor head, and a signal processing unit. The optical sensor comprises a transparent substrate, a transparent electrode disposed on the transparent substrate, a thin film of a polymer non-linear optical material disposed on the transparent electrode, and a reflective film disposed on the thin film, and is positioned in close approximation to and without contacting an electrode to be measured on the wiring board. The sensor head comprises a light source, optical means for guiding light from the light source into the optical sensor, and detecting means for detecting reflected light from the optical sensor. The detecting means supplies the signal processing unit with a signal corresponding to the intensity of the reflected light when the electrode on the wiring board is applied with a voltage.

Apparatus for detecting defects of wires on a wiring board wherein

A low-cost, fast and highly accurate defective wire detector is provided for detecting defects of wires in a wiring board at least having one wiring layer. The detector has a light emitting element substrate comprising a transparent substrate and a light emitting element arranged thereon. The light emitting element is, for example, an organic light emitting element or an organic light emitting diode. The light emitting element substrate is placed to be in contact with wires on a wiring board under measurement. The detector detects and processes a condition of light emitted from the light emitting element substrate when a voltage is applied between the light emitting element substrate and the wiring board, and determines whether or not any defective wire is present.

Apparatus for detecting defects of wiring board

A polymer containing triazine rings that has a molecular weight of 5,000-1,000,000 and that comprises a recurring unit represented by the general formula (I): ##STR1## wherein X.sup.1 and X.sup.2 are each independently S, NR.sup.1 (R is a hydrogen atom, an alkyl group or an aryl group) or O; Y may be an alkylene group, a divalent substituted or unsubstituted aromatic ring group that do not contain chromophore moieties or a group in which said aromatic ring groups are bonded or condensed together; Z is either a spacer group comprising a group represented by --G--(CH.sub.2).sub.n -- (n is an integer of 1-10) or a direct bond (G is S, NR.sup.4 or O, and R.sup.4 is a hydrogen atom, an alkyl group or an aryl group); and A is an organic chromophore moiety in which an electron donative group and an electron attractive group are conjugated via a .pi.-electron system. The polymer is lightproof, forms a thin film of high quality and has a high glass transition point.

Growing community of inventors

Higashimatsuyama, Japan

Tsunetoshi Sugiyama